[PREMOD] Modding Motorola Xoom Verizon for speaking HSPA+ - Xoom General

I'm on the best way, here the facts:
1.) Crossflashing Xoom VZW with the System Image(Tiamat Kernel as boot) of European 3G Xoom is working fine after fastboot -w (complete wipe)
2.) With a firmware upgrade of Atirx 4G CDMA we saw, it is possible to reconfigure MDM6600 for GSM
3.) Simcardslot is working fine with GSM Simcards
Hi all,
Yesterday I got my Xoom. I'm how you see from Austria(Europe), but I ordered it from over the sea because I saw in a teardown, that there is a MDM6600 chip built in.
Now I have it, HSPA is not working, but should only be limited to CDMA by the firmware.
I would like to change that.
My first idea is, to search for MDM6600 driver sources, compile them for the tegra and replace the existing... but this expect, that the limitation is in the libril and not in the kernel...
Any thoughts to this topic?
edit: stupid me, first of all would be nice to take a look at etc
someone has an idea what the location.cfg is, and what the flag DL_LCS_NETWORK_3GPP (set to 0) are doing?
Kind Regards
Ralph
Click to expand...
Click to collapse

I have no idea how to help but I sure would like to. If there is anything I can do let me know I'm all set up to do all kinds of stuff I just would not know where to begin.
Sent from my Xoom using XDA App

Just 'cause the chip does both modulation schemes doesn't mean the appropriate antenna-interface hardware is built into the device. They put a 6600 in there 'cause they fully expected to push out a GSM version; I'd just wait for that one.

concerning the antennas(from www.motorola.com):
CDMA 800 /1900 LTE 700, Rx diversity in all bands
would be a bit funny, to use a multiband chip, to need not to produce different devices, but differ by the antennas
regards

Not to mention the fact that there is a place to stick a sim card in no the top of the device

Sim card slot is for the lte upgrade...

The SIM card is for LTE in the States, but again- just 'cause the chip is in there doesn't mean the US-spec Xoom has the requisite hardware (not to mention the proprietary Qualcomm modem SW) to let it run on GSM in the versions shipped in the states.
When we make GSM handsets at my clients, we even have to make separate hardware for the I, II, V-banded stuff (AT&T) vs. the I, II, IV-banded stuff (T-Mobile), and that's all with the same chipset.

You are going to need to take a good look at the NVM and amss.mbn(radio baseband image) in order to make this work.
Have you used RadioComm to read and dump the NVM?
That would be an excellent place to start. Unless of course, you had access to MDM6600 GSM radio images and source code...

I don't have even the slightest knowledge necessary to be able to contribute to this conversation but I do know that I am planning to go out the country for quite a while and would love to be able to connect to a wireless data service of any kind. I will be in a country with cdma also but of course it is not verizons.
If what you are trying to do works I would happily try to donate something out of appreciation. The idea of my xoom working with gsm networks would be more than a dream come true. I wish you all the best. Let me know if there is anything I can do (I know there isn't though, I really dont know the first thing about modding other than that the modders are awesome!)
Sent from my Xoom using XDA Premium App

Good Morning,
There is something confusing me, and it seems I've to think about something I cannot imagine actually.
So my big stupid question:
Do you need a simcard to connect to verizon's cdma network?
And if not, how are you athentificating in the net?
Regards
Ralph

CDMA authenticates to its network via the combination of the MEID (formerly known as "ESN") and the MIN, both of which are hardwired into the firmware of the device.

Ok, so the device is authentificating, but from where do the network know that you are user xyz? In gsm networks because of the simcard id, and in cdma nets?
Sent from my Xoom using XDA App

They associate the MEID/MID/MIN to your account.
For example, they scanned the barcode from my Xoom when I bought it and added it to the Verizon account they had already finished setting up for me. Once I got it home and hit the "Activate Device" button, the device got on the VZ network, where the setup information (the phone number, PRL, etc.) got downloaded to the CDMA 3G radio. But all that happened 'cause the VZ servers were already set up to associate that MEID to me beforehand.

ouch, that means there is a massive firmwaremod needed so that it can use the simcardslot for auth...
ok, please tell me what you know about how transfering the data from the sim to the chip works (bookmarks and so on)
do the ril-daemon play a role?
thanks
ralph

GhostOfTheNet said:
Good Morning,
There is something confusing me, and it seems I've to think about something I cannot imagine actually.
So my big stupid question:
Do you need a simcard to connect to verizon's cdma network?
And if not, how are you athentificating in the net?
Regards
Ralph
Click to expand...
Click to collapse
Now no sim card is used to connect to Verizon's 3G network. The new 4G Lte network will use a sim card, but that has yet to be activated. At present you connect to Verizon's 3g network through the cdma radio which needs to be registered and then activated by them, but it does not use a sim card.
Sent from my Xoom using XDA Premium App

The sim card slot is a dummy slot right now, there are no electronics in there that can even read a sim card right now. When you send out the Xoom for the LTE upgrade they will put a real modem in there with the sim card slot. It is PHYSICALLY IMPOSSIBLE to convert the Verizon Xoom to GSM at this point in time.

post to delete

chaoscentral said:
The sim card slot is a dummy slot right now, there are no electronics in there that can even read a sim card right now. When you send out the Xoom for the LTE upgrade they will put a real modem in there with the sim card slot. It is PHYSICALLY IMPOSSIBLE to convert the Verizon Xoom to GSM at this point in time.
Click to expand...
Click to collapse
Key words: "...at this point in time."
That may change once the hardware is in place for the SIM slot it MAY be possible to build a radio image that can access GSM/HSPA bands.
Not easy, but not impossible.

cellzealot said:
Key words: "...at this point in time."
That may change once the hardware is in place for the SIM slot it MAY be possible to build a radio image that can access GSM/HSPA bands.
Not easy, but not impossible.
Click to expand...
Click to collapse
You would also need to modify the antenna to pick up the correct frequencies, they usually aren't on the same band as CDMA. For example VZW is the only carrier going for a total 700mhz 4G network.

chaoscentral said:
The sim card slot is a dummy slot right now, there are no electronics in there that can even read a sim card right now. When you send out the Xoom for the LTE upgrade they will put a real modem in there with the sim card slot.
Click to expand...
Click to collapse
That's almost correct. There's a working, active SIM-card slot that's hooked up to a serial port on the CPU; reading a SIM card right now would just be a matter of some (extra?) software. What's physically missing is the actual LTE modem, and there's a dummy card in the mini-PCI slot right now.
But that's not why it's not possible to turn the current device into GSM; as noted in this thread before, there's a lot of other things that'd need to be there, and just 'cause the 6600 is GSM-capable doesn't mean it's a simple, software-only modification. Even if it were, good luck getting the customized baseband software from QCT for it.

Related

Htc 8525

Does anyone know if an unlocked 8525 will work on Verizons network? I've been using it on Alltel and Verizon bought them out now they want me to get a new phone. Sure hate to give this one up.
If the sim unlock has been run the there should be no reason why not...
Mind you I'm in Australia...
Cheers...
CDMA vs GSM
I went back and forth on this one. (and Welcome!!!!!)
Verizon here in the states is a CDMA (EVDO) system that doesn't use sim cards, GSM systems does. This relates to how your phone communicates on the network. Now willl a GSM phone work on a CDMA network, i think that it will. The SIM card in GSM phones supply the network with your PIM to access the network, it is tied entirely to the network not the phone. CDMA requires action from the carrier, and your access to the network is tied to phone not the network. You deactivate one phone first, then activate the second. You'll probably need to supply your IMEI to verizon and they'll load your access. Just a guess though, cause I've been with cingular/at&t since i carried around backpack sized mobile phones.
Does anyone know better?
As far as I know of, no. I don't believe it has a radio for the CDMA. Although you state you have used it on Alltel which I thought was CDMA...
What reason did they give for wanting you to get a new phone?

“Answered but not Perfected” Getting the Droid 2 Global to work on USA GSM

I was at at&t and we where unable to activate the phone even though the phone is capable. At&t said everything was good on there end but the phone just wont get a signal but it says it is on at&t.
Does anybody have any ideas how to fix this?
Have u unlocked the sim slot on the phone?
swangotp said:
I was at at&t and we where unable to activate the phone even though the phone is capable. At&t said everything was good on there end but the phone just wont get a signal but it says it is on at&t.
Does anybody have any ideas how to fix this?
Click to expand...
Click to collapse
Quite a few people (including myself) on various boards have acknowledged having this problem as well. I got the SIM unlock code from Verizon but when I do a GSM network scan, nothing is detected. I know it has been escalated above level 2 support at Motorola and hopefully they will address it shortly. Here's another thread about it over on droidforums: http://www.droidforums.net/forum/droid-2-global/96596-droid-2-global-unlock-foreign-sim.html
Yes, I have unlocked the phone from the code verizon gave me.
I hope its a fixable problem. But I noticed when I use an active tmob sim the phone doesnt even say tmobile. But when I use an at&t sim it atleasts says at&t.
I'm very interested (as I'm sure many others are) in a resolution to this. OP did you call VZW global support and let them know you're having this problem? Hopefully the more they hear about it, the faster they'll have a fix
SGMD1 said:
I'm very interested (as I'm sure many others are) in a resolution to this. OP did you call VZW global support and let them know you're having this problem? Hopefully the more they hear about it, the faster they'll have a fix
Click to expand...
Click to collapse
They where no help at all they said it was for foreign sim cards only and that at&t and tmobile where not supported. But they did say verizon was better than both of them combined.
If you feel like experimenting try this:
Go to dialpad, and enter *#*#4636#*#*
Click on Phone Information, and then scroll down to bottom. Set preferred network type from "CDMA auto(PRL)" to "WCDMA preferred" and see if that kicks it on ATT.
I'm 99.9% sure after looking through the user guide that VZW has restricted use of the 850/1900 MHz GSM/UMTS bands, even though the device has the hardware to support them. Most foreign networks use 900/1800 GSM and 2100 UMTS but AT&T/T-Mobile use 850/1900, which is why no one has had any success with them yet.
Hopefully someone can figure out a workaround.
EDIT: Just a US GSM restriction...looks like 850/1900 work abroad: http://www.droidforums.net/forum/dr...d2-global-south-america-first-impression.html
IslesFan said:
If you feel like experimenting try this:
Go to dialpad, and enter *#*#4636#*#*
Click on Phone Information, and then scroll down to bottom. Set preferred network type from "CDMA auto(PRL)" to "WCDMA preferred" and see if that kicks it on ATT.
Click to expand...
Click to collapse
These where the results I got, so clearly it is getting seeing the network. Just not connecting.
Just got off the phone with Motorola and they said the droid 2 global was only for verizon sim cards and when I told them about the unlock code the guy didn't know what they where for. So another dead end. Another theory I have is that the stock verizon rom is blocking at&t so maybe if someone can flash another rom we can see if this is the problem.
Further proof the 850/1900 bands are locked: https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/57058/p/30,6720,7706
"GSM-based global services work only with a SIM card supplied by Verizon Wireless® or by another GSM 900 or GSM 1800 service provider. When you set your phone to use a GSM 900 or GSM 1800 network you may be prompted to enter a subsidy code. To get this code, contact Verizon Wireless."
EDIT: Looks like they're just locked in the US, not abroad: http://www.droidforums.net/forum/dr...d2-global-south-america-first-impression.html
SGMD1 said:
Further proof the 850/1900 bands are locked: https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/57058/p/30,6720,7706
"GSM-based global services work only with a SIM card supplied by Verizon Wireless® or by another GSM 900 or GSM 1800 service provider. When you set your phone to use a GSM 900 or GSM 1800 network you may be prompted to enter a subsidy code. To get this code, contact Verizon Wireless."
Click to expand...
Click to collapse
If this is true why would they say it has the 850 and 1900 bands? I know its not a hardware problem, so if its a software problem there is a chance we can have a workaround. Or the locked bands might be because of the verizon rom.
I was able to put a new rom on my Droid 2 Global and although the rom was working since it was for a droid 2 the radio was not working properly. I was not able to force turn it on. I still have several more things I will try tonight.
swangotp said:
I was able to put a new rom on my Droid 2 Global and although the rom was working since it was for a droid 2 the radio was not working properly. I was not able to force turn it on. I still have several more things I will try tonight.
Click to expand...
Click to collapse
Keep us posted!
This has been done before on Windows Mobile phones (CDMA HTC Touch Pro 2) and requires a radio reflash since the bands are locked in the radio firmware. I am hoping they will develop a solution for Android phones. http://rhodiumw.htc-unlocks.com/
Being that this the 1st CDMA/GSM (Tie if you count Droid Pro) Android device I would wait and see.
firebrain said:
This has been done before on Windows Mobile phones (CDMA HTC Touch Pro 2) and requires a radio reflash since the bands are locked in the radio firmware. I am hoping they will develop a solution for Android phones. http://rhodiumw.htc-unlocks.com/
Being that this the 1st CDMA/GSM (Tie if you count Droid Pro) Android device I would wait and see.
Click to expand...
Click to collapse
Good info, thanks
As from what I learned from previous devices the Droid 2 Global Verizon has a security locked radio. I have seen people unlock the radios from windows mobile phones, it is as easy as installing a .zip file that will unlock the security. I believe it is the same way with the Droid 2 Global. I will try to get this working but I don’t have much knowledge in the development field. But I do know you will have to be rooted. I have also spoke with a friend at Verizon, which claims that they did indeed lock the radios and there is a workaround. He said he was not familiar with this workaround but said it was close to the problem with the windows mobile security locked devices. I am calling this the official reason the phone wont work with US networks. This makes sense, and now that we found the problem it shouldn’t be long before we find a way around it.
Thanks for the info swangotp...that definitely sounds promising. Keep us posted!
subscribing to this thread... I know this is possible.

GSM/CDMA radio question

I have a question about how GSM and CDMA radios work. I have an HTC Merge from USCC (I live in Vermont, USA). They use CDMA and leave the SIM unlocked for prepaid SIM cards. I travel to Alberta, Canada on a regular basis and have access to a post-paid account on Bell Mobility (GSM). I would like to figure out if it is possible to set up my phone to work on both lines at the same time, without having to switch back and forth to check for incoming calls and texts.
Is such a setup possible?
If it is, does anyone know how I would go about getting it set up (perhaps a different thread for the answer to this part)?
On a CDMA phone, where is the carrier information stored (phone number, PRL, etc.)?
The phone is currently rooted, S-OFF, SuperCID, SIM Unlocked, running 2fastrom's USCC Gingerbread ROM.
Radio version is 1.08.00.0804
I am posting this here because I consider it to be first of all a question of whether it is possible to use both systems at the same time, regardless of the phone itself. I have added the phone info in case those who may know the answer need it. If it needs to be moved, I have no problem with that.
Thanks for your time and consideration.
All the best,
Reuben
....
Sent from my HTC Sensation Z710e with Beats Audio using Tapatalk
most phones do not support both cdma and gsm
Sent from my GT-I9000 using Tapatalk
I know the iPhone 4s can use both but it has two separate antennas to accomplish this. I think it comes down to hardware.
Isn't Verizon coming up with some type of solution with VMWare for this? Where you could have two numbers active at the same time, one of them being a business number that was running in VMWare?
Yes, it is partly a matter of hardware - the Merge is set up for both systems. Still not sure if it can "listen" for two different numbers at once. Also curious about whether the phone needs to be listening to both bands at the same time if one number is CDMA based and the other is SIM/GSM based.
Verizon's solution sounds interesting - not sure it is enough to make me switch, particularly if both numbers have to be on their network.
Yes but only if you are not Verizon.
http://www.pcworld.com/businesscenter/article/247646/lg_verizon_and_vmware_demo_virtual_work_phone.html
Currently Telefonica will support 2 simultaneous numbers due to a dual-sim. I really can't wait until entire networks start switching to an all IP based system. This would allow a much more flexible system then the NAM currently used.
Isn't Verizon coming up with some type of solution with VMWare for this? Where you could have two numbers active at the same time, one of them being a business number that was running in VMWare?
Click to expand...
Click to collapse
Dual sim
It will eventually coming , we may see this type of services in near future once iphone will start shipping with GSM and CDMA unlocked version.
No its not doable at the same time

Moto E xt1526 - use GSM SIM, going round and round

Greetings fellow telephony addicts - purchased a Boost Mobile Moto E w/5.1 (xt1526) because of apparent ease of ul'ing bl and rooting. True enough --
However since then I've been trying to get the device to allow use of a GSM SIM (USA/att.) Recently did it on a vzw (xt1528) no problem following instructions found here bit the xt1526 has beaten me senseless, going so far as to install cm13 in a totally illogical move. It works beautifuly, if you don't need calls or mms. Searched the crap out of the E forums with a couple of tips that did not pan out.
Anyone give me any hints /tips or even a nay as in "you dummy you can't to that!"
TIA,
Littlalex
littlalex said:
Greetings fellow telephony addicts - purchased a Boost Mobile Moto E w/5.1 (xt1526) because of apparent ease of ul'ing bl and rooting. True enough --
However since then I've been trying to get the device to allow use of a GSM SIM (USA/att.) Recently did it on a vzw (xt1528) no problem following instructions found here bit the xt1526 has beaten me senseless, going so far as to install cm13 in a totally illogical move. It works beautifuly, if you don't need calls or mms. Searched the crap out of the E forums with a couple of tips that did not pan out.
Anyone give me any hints /tips or even a nay as in "you dummy you can't to that!"
TIA,
Littlalex
Click to expand...
Click to collapse
Boost / sprint xt1526 are locked so that us domestic GSM Sims are not recognized. To my knowledge, no one here has yet gotten around this. I switched from a sprint branded one to a USCellular, which is fully SIM unlocked out of the box, bootloader unlockable, and supports att LTE. Using it right now with my postpaid ATT SIM
Sent from my XT1526 using Tapatalk
Thanks - That puts an end to the quest, no harm no foul -- On to the next phone!
Littlalex
dandrumheller said:
Boost / sprint xt1526 are locked so that us domestic GSM Sims are not recognized. To my knowledge, no one here has yet gotten around this. I switched from a sprint branded one to a USCellular, which is fully SIM unlocked out of the box, bootloader unlockable, and supports att LTE. Using it right now with my postpaid ATT SIM
Sent from my XT1526 using Tapatalk
Click to expand...
Click to collapse
Only thing I can think of is to flash the RADIO from a variant that isn't SIM locked and seeing if that works. It's a risky experiment tho... it could definitely brick the device in terms of ever being able to connect to a cell tower again.
Closest match is the USC 5.1 stock ROM's radio, which has the same model number XT1526, and is CDMA compatible, but that phone is also known to work on domestic GSM networks.
Double Thanks - Phone is useless to me as is so it's worth a go. Will report the results here.
Littlalex
PresidentMcCain said:
Only thing I can think of is to flash the RADIO from a variant that isn't SIM locked and seeing if that works. It's a risky experiment tho... it could definitely brick the device in terms of ever being able to connect to a cell tower again.
Closest match is the USC 5.1 stock ROM's radio, which has the same model number XT1526, and is CDMA compatible, but that phone is also known to work on domestic GSM networks.
Click to expand...
Click to collapse
littlalex said:
Double Thanks - Phone is useless to me as is so it's worth a go. Will report the results here.
Littlalex
Click to expand...
Click to collapse
Thanks for trying. I hope it works!
littlalex said:
Double Thanks - Phone is useless to me as is so it's worth a go. Will report the results here.
Littlalex
Click to expand...
Click to collapse
Good luck! There was some discussion, in the CDMA development subforum iirc, about this a couple months ago.
Sent from my XT1526 using Tapatalk
I fell in the same trap, but you can still make the phone useful if you sign up for freedom pop or ringplus, i plan on keeping the phone as a backup and getting the N5X next week.
mykenyc said:
I fell in the same trap, but you can still make the phone useful if you sign up for freedom pop or ringplus, i plan on keeping the phone as a backup and getting the N5X next week.
Click to expand...
Click to collapse
Yeah, I've got ring plus on mine with the totally free plan. Nice to have a CDMA emergency phone when my primary carrier is GSM.
Sent from my XT1526 using Tapatalk
Weird - I installed the complete USC 5.1 stock ROM - Everything seems to work fine, but the system version and the broadband version coming up as Sprint. US cellular is not a Sprint MVNO I don't think, but it seems to be kind of a hybrid in terms of networks? No option for switching the network to GSM/LTE in the settings that I can find.
Not sure what I'm going to try next...
Littlalex
PresidentMcCain said:
Only thing I can think of is to flash the RADIO from a variant that isn't SIM locked and seeing if that works. It's a risky experiment tho... it could definitely brick the device in terms of ever being able to connect to a cell tower again.
Closest match is the USC 5.1 stock ROM's radio, which has the same model number XT1526, and is CDMA compatible, but that phone is also known to work on domestic GSM networks.
Click to expand...
Click to collapse
littlalex said:
Weird - I installed the complete USC 5.1 stock ROM - Everything seems to work fine, but the system version and the broadband version coming up as Sprint. US cellular is not a Sprint MVNO I don't think, but it seems to be kind of a hybrid in terms of networks? No option for switching the network to GSM/LTE in the settings that I can find.
Not sure what I'm going to try next...
Littlalex
Click to expand...
Click to collapse
Did you flash the Radio/Modem too? If not, that's why the baseband comes up as Sprint.
Dial *#*#4636#*#*, phone info, change "CDMA/LTE" to "LTE/GSM/CDMA auto (PRL)". If you can't do that, follow the 5.1 instructions here: http://forum.xda-developers.com/moto-e-2015/general/how-to-verizon-moto-e-2015-gsm-network-t3098953 (change the 9 to a 10 for LTE/GSM/CDMA)
This will allow you to change the phone to LTE/GSM/CDMA mode.
Isn't the NON-HLOS.bin file the modem file? I did the keyboard commands and got the phone info and was able to change it but it didn't change anything, live or after a reboot - same thing. did the adb shell commands and the same
thing, cellular network settings grayed out. I put back the sprint SIM that came with the kit and it was fine and the network settings are available...hmmmm.
I greatly appreciate the suggestions. I'm gonna leave the battlefield and get dinner or my wife will call me mean geeky names
PresidentMcCain said:
Did you flash the Radio/Modem too? If not, that's why the baseband comes up as Sprint.
Dial *#*#4636#*#*, phone info, change "CDMA/LTE" to "LTE/GSM/CDMA auto (PRL)". If you can't do that, follow the 5.1 instructions here: http://forum.xda-developers.com/moto-e-2015/general/how-to-verizon-moto-e-2015-gsm-network-t3098953 (change the 9 to a 10 for LTE/GSM/CDMA)
This will allow you to change the phone to LTE/GSM/CDMA mode.
Click to expand...
Click to collapse
Putting this thread to rest
Spent the last couple of days flashing the E with rom after rom, particularly of GSM phones, ATT, TM, etc and their respective radio files. And not to my surprise the phone works fine with every one of then regardless of model XTxxxx anything, phone runs flawless, except for the network of course, which always remains Sprint.
I have to conclude, unless someone can prove otherwise, that the phone network part is either embedded in the chipset as hardware or a combination of hardware and software, or the modem files are somehow protected from being overwritten.
Was interesting and educational.
Thanks to those who gave ideas or suggestions, especially you Mr. President
Littlalex
littlalex said:
Weird - I installed the complete USC 5.1 stock ROM - Everything seems to work fine, but the system version and the broadband version coming up as Sprint. US cellular is not a Sprint MVNO I don't think, but it seems to be kind of a hybrid in terms of networks? No option for switching the network to GSM/LTE in the settings that I can find.
Not sure what I'm going to try next...
Littlalex
Click to expand...
Click to collapse
dandrumheller said:
Boost / sprint xt1526 are locked so that us domestic GSM Sims are not recognized. To my knowledge, no one here has yet gotten around this. I switched from a sprint branded one to a USCellular, which is fully SIM unlocked out of the box, bootloader unlockable, and supports att LTE. Using it right now with my postpaid ATT SIM
Sent from my XT1526 using Tapatalk
Click to expand...
Click to collapse
PresidentMcCain said:
Did you flash the Radio/Modem too? If not, that's why the baseband comes up as Sprint.
Dial *#*#4636#*#*, phone info, change "CDMA/LTE" to "LTE/GSM/CDMA auto (PRL)". If you can't do that, follow the 5.1 instructions here: http://forum.xda-developers.com/moto-e-2015/general/how-to-verizon-moto-e-2015-gsm-network-t3098953 (change the 9 to a 10 for LTE/GSM/CDMA)
This will allow you to change the phone to LTE/GSM/CDMA mode.
Click to expand...
Click to collapse
Ok –*question. If I put Cyanogenmod 13 (Lollipop) onto the Moto E 1526 (U.S. Cellular version) –*will GSM work on it? I need to buy my grandma a GSM phone who doesn't live in the States & I want the GSM card to be easy plug in play for her.
I know that the U.S. Cellular version is the best because it is unlocked for GSM as well, but I believe XT1526's default radio is CDMA.
Maybe I should get a GSM sim card here in the States and switch it to GSM on CM13 (if this is possible) –*that way all my grandmother has to do is put the sim card in without any hassle.
theshiz89 said:
Ok –*question. If I put Cyanogenmod 13 (Lollipop) onto the Moto E 1526 (U.S. Cellular version) –*will GSM work on it? I need to buy my grandma a GSM phone who doesn't live in the States & I want the GSM card to be easy plug in play for her.
I know that the U.S. Cellular version is the best because it is unlocked for GSM as well, but I believe XT1526's default radio is CDMA.
Maybe I should get a GSM sim card here in the States and switch it to GSM on CM13 (if this is possible) –*that way all my grandmother has to do is put the sim card in without any hassle.
Click to expand...
Click to collapse
The device does do funky things with the radio on first boot on a new rom. I've run several CM based marshmallow roms. There's no real issue, but you need to go through the non-adb method (using the network app) to get GSM working on every new clean flash. Typically this means pulling the GSM SIM before initial boot (when I don't, the radio keeps cycling through modes making initial setup very difficult), do setup on Wi-Fi, turn off radio, insert SIM, then do the process.
I definitely would not give the device to a non tech savvy person before doing this on a clean flash. Once it's done, you can remove and reinsert Sims without issue.
Sent from my XT1526 using Tapatalk
dandrumheller said:
you need to go through the non-adb method (using the network app) to get GSM working on every new clean flash. Typically this means pulling the GSM SIM before initial boot (when I don't, the radio keeps cycling through modes making initial setup very difficult), do setup on Wi-Fi, turn off radio, insert SIM, then do the process.
I definitely would not give the device to a non tech savvy person before doing this on a clean flash. Once it's done, you can remove and reinsert Sims without issue.
Sent from my XT1526 using Tapatalk
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Click to collapse
Thanks for the info and advice. Much appreciated.
Btw, when you say turn off radio –*you mean by using network app right? And you'r ereferring to these instructions from: http://forum.xda-developers.com/moto-e-2015/general/help-confirm-5-1-how-to-verizon-moto-e-t3264258 ?: "Switch Sims
switch to settings -> cellular networks
Pull down notifications-> Airplane mode ON
Network App -> GSM / LTE (close app)
switch to settings
verify 4g (I always click on it, still shows CDMA)
NEtwrok app -> Turn on Radio
Settings -> click on CDMA -> Select 4G
Airplane Mode OFF"
theshiz89 said:
Thanks for the info and advice. Much appreciated.
Btw, when you say turn off radio –*you mean by using network app right? And you'r ereferring to these instructions from: http://forum.xda-developers.com/moto-e-2015/general/help-confirm-5-1-how-to-verizon-moto-e-t3264258 ?: "Switch Sims
switch to settings -> cellular networks
Pull down notifications-> Airplane mode ON
Network App -> GSM / LTE (close app)
switch to settings
verify 4g (I always click on it, still shows CDMA)
NEtwrok app -> Turn on Radio
Settings -> click on CDMA -> Select 4G
Airplane Mode OFF"
Click to expand...
Click to collapse
Yep, you got it. Actually, I don't think it's too picky about the order of operations as described in that thread - I've done this many times without referring to the thread so have likely done it "wrong" at times, and it still works. Basically, radio off (either via airplane mode or network app), switch modes, radio back on.
Just don't clean flash a rom without either access to Wi-Fi, or a locally installable copy of the network app.
Sent from my XT1526 using Tapatalk
Hey .. i am in Karachi Pakistan ...
i have seen this phone workingperfectly with gsm network until someone makes a factory Data reset ..
still not found out the solution ..
the devices arrived from china in working condition ..
FYI - US Cellular was bought out by sprint last year, so they are now a sprint mvno.
Did you try flashing the stock 6.0 ROM?

Axon 7, dual SIM, PagePlus (vz vmno) and VZ sim card same time

Hi devs! got new Axon7.... really hoping to run both CDMA SIMS at the same time. Can we start a thread for dual SIM use, where neither is a GSM SIM? I'd really like to run both numbers on this phone. Tried all kinds of settings, currently on nightly LOS. I've tried nearly every APN setting.
kcnorden said:
Hi devs! got new Axon7.... really hoping to run both CDMA SIMS at the same time. Can we start a thread for dual SIM use, where neither is a GSM SIM? I'd really like to run both numbers on this phone. Tried all kinds of settings, currently on nightly LOS. I've tried nearly every APN setting.
Click to expand...
Click to collapse
Unfortunately, only SIM1 is wired to the phone's CDMA antenna (GSM/CDMA/HSPA/EVDO/LTE). SIM2 is only wired to GSM/HSPA/LTE. As the phone is not approved by Verizon, you need CDMA to be able to authenticate the device with the network, so even if you wanted to go Verizon-LTE-data-only on SIM2, it won't be able to connect. For any Verizon-based provider, it's SIM1 or bust.
xtermmin said:
Unfortunately, only SIM1 is wired to the phone's CDMA antenna (GSM/CDMA/HSPA/EVDO/LTE). SIM2 is only wired to GSM/HSPA/LTE. As the phone is not approved by Verizon, you need CDMA to be able to authenticate the device with the network, so even if you wanted to go Verizon-LTE-data-only on SIM2, it won't be able to connect. For any Verizon-based provider, it's SIM1 or bust.
Click to expand...
Click to collapse
I was afraid of that, or access to the modem, for example. If we can't connect via hardware, would it be possible to emulate or allow for software control/flipping "sims" so to speak? Perhaps moving this to the dev forum... I really appreciate your expertise and help. I'd like to keep the second # on PP, but might have to somehow port or forward to to the main/other VZW connection.
With all that said, I recall getting SIM2 working..... so I just checked. disabled SIM1, and after a few jiggles, I get LTE on SIM2, can cruise internet... so I might ask, if a hardware wiring restriction is there, my setup doesn't seem to reflect it. I can get ping test on ip4 to work.... ????
kcnorden said:
I was afraid of that, or access to the modem, for example. If we can't connect via hardware, would it be possible to emulate or allow for software control/flipping "sims" so to speak? Perhaps moving this to the dev forum... I really appreciate your expertise and help. I'd like to keep the second # on PP, but might have to somehow port or forward to to the main/other VZW connection.
With all that said, I recall getting SIM2 working..... so I just checked. disabled SIM1, and after a few jiggles, I get LTE on SIM2, can cruise internet... so I might ask, if a hardware wiring restriction is there, my setup doesn't seem to reflect it. I can get ping test on ip4 to work.... ????
Click to expand...
Click to collapse
It seems to be very fickle, constantly having to toggle radio, network protocols, and seems to be either/or. After re-activating the SIM1, the SIM2 signal meter will show an R, with no bars of signal. The R stays, but no SMS will send out. If I disable SIM1, LTE signal bars on SIM2, no R..... and internet works fine. still no SMS on SIM2. double checked APN settings for pageplus(TRACFONE.VZWENTP), they are customized to included MMS stuff, oddly, it won't add with MCC310 and MNC012 like PP tells me, but matched to my S4 with PP, it adds well as MCC311/MNC480(same as VZW APN).
(Wondering about ZTE AXON 7 dual SIM VZW and Lineage????)All other LOS 14.2 nighlty, speakers, battery mgmt, camera (back side button seemed to have worked BEFORE LOS?) u know, no screen problems. unlock, TWRP, root(if you want), LOS whatever you like.
Should I be pursuing older modem firmware to resolve dual CDMA SIM capabilities? APN or protcol settings? specific dual SIM ROMs? Virtual SIM swapping driod zip? Any direction would be duly noted by the Internet. thx all.
bump. I really dont want to flip SIMs every few days. Any help please?
So, i have to constantly switch SIMs between slot 1 and 2, hoping no SMS messages expire? Cmon, is no one going to help us find a solution to this?
kcnorden said:
So, i have to constantly switch SIMs between slot 1 and 2, hoping no SMS messages expire? Cmon, is no one going to help us find a solution to this?
Click to expand...
Click to collapse
The user above already answered your question correctly, to the best of my knowledge - this phone will not be able to achieve what you desire. Maybe you can get an LTE-only connection on slot 2 with a CDMA SIM but even that's iffy as the Axon 7 typically rejects CDMA SIMs in slot 2, as I'm sure you've noted. Not sure if LOS allows it but even if so I would think the same technical limitation applies.
This isn't a software limitation...it's a hardware limitation. Thus we can't do much about it.
And for reference, the other Verizon-friendly dual SIM phone, the Xiaomi Mi Note 2, also has this limitation though it's slightly better as you can keep both CDMA SIMs in both slots and switch between. Perhaps that's more what you're looking for?
hot-swapping SIMS seems to cause connection issues, best to swap while powered down? this stinks, anyone? HELP
Well, if it is a hardware issue, can we not sym link or software mod to allow us not to remove SIM's all the time, missing messages? The Xiaomi Note2 seems like the fix, but .....B13..... that's why the Axon7 seems a better fr for VZW towers...
I really appreciate the info.
​
kcnorden said:
Well, if it is a hardware issue, can we not sym link or software mod to allow us not to remove SIM's all the time, missing messages? The Xiaomi Note2 seems like the fix, but .....B13..... that's why the Axon7 seems a better fr for VZW towers...
I really appreciate the info.
Click to expand...
Click to collapse
The Mi Note 2 Global version has band 13 and 4 and 2 so it's totally compatible with Verizon. Also CDMA 0 and 1 so there are no limitations in this respect.
flyer_andy said:
​
The Mi Note 2 Global version has band 13 and 4 and 2 so it's totally compatible with Verizon. Also CDMA 0 and 1 so there are no limitations in this respect.
Click to expand...
Click to collapse
Really? Just looked up the Note2, looks equally impressive. Might hafta swappa the AXON7 to note2..... Back to the AXON7 , does anyone have experience making it work with CDMA only on SIM2? I could live with the AXON if SIM2 would get/send SMS.
flyer_andy said:
​
The Mi Note 2 Global version has band 13 and 4 and 2 so it's totally compatible with Verizon. Also CDMA 0 and 1 so there are no limitations in this respect.
Click to expand...
Click to collapse
Is it known if both SIM slots on the Mi Note 2 Global are hooked up to the CDMA antenna?
xtermmin said:
Is it known if both SIM slots on the Mi Note 2 Global are hooked up to the CDMA antenna?
Click to expand...
Click to collapse
Guess we have to buy one and see. report back in a bit.
flyer_andy said:
​
The Mi Note 2 Global version has band 13 and 4 and 2 so it's totally compatible with Verizon. Also CDMA 0 and 1 so there are no limitations in this respect.
Click to expand...
Click to collapse
So, Flyer_Andy... does the VZW VMMO SIM work in slot 2? :angel:
kcnorden said:
So, Flyer_Andy... does the VZW VMMO SIM work in slot 2? :angel:
Click to expand...
Click to collapse
Yes it seemed to work in both slots. Unfortunately I sold my Note 2 as I really prefer the Axon 7 but I do seem to recall that either slot worked just fine. I seem to recall trying two different CDMA SIMs and independently they worked when you changed the data to the one you wanted to use. But they did not work simultaneously. Hopefully I'm remembering correctly as this was a few weeks ago but I'm pretty sure the Note 2 did allow you to toggle between two CDMA SIMs without issue.
In general, the Note 2 had better radio firmware than the Axon 7...much more stable in every way. It was a very fine device though I didn't like the pentile display and that in the end was why I sold it. I also like to use a screen protector and the curved screen was really annoying as you have to use a wet application film to get the best results and I'm not very good at applying those.
Hey...I just wanted to update this one as I got ahold of a Xiaomi Mi Mix 2 and tested it with two active Verizon SIMs. The results are good vis-a-vis the OP's issue.
You can have two CDMA SIMs in the Mix 2 and while you won't get simultaneous CDMA connection (even with VoLTE connected...which would seem to "free up" the CDMA connection for use on the opposing SIM but perhaps this isn't techincally feasible) on both SIMs, you will be able to switch back and forth without changing anything relating to the SIMs' physical position, unlike the Axon 7. So, in case you're willing to throw about $550 at a new Xiaomi Mi Mix 2, it looks like dual SIM-single standby operation can be achieved with two CDMA SIMs. The Xiaomi Mi Note 2 Global almost certainly can perform in this way as well.
ADD'L INFO: I tried this setup for an hour or so and I ran into some connectivity issues, where the SIMs would be stuck on an inactive CDMA connection or CDMA+EvDO 3G. To resolve this, I had to go into the testing menu (*#*# 4636 *#*# in the dialer) and manually turn the radio off totally (airplane mode wasn't sufficient) and then turn the radio back on. This seemed to resolve things permanently.
Also, this is unrelated, but for AT&T/Verizon users, the Mi Mix 2 looks to be capable of CDMA + UMTS (3G) simultaneous service, which is a godsend as presently the Axon 7 only allows EDGE + CDMA and thus creates service issues for AT&T customers in 3G-only areas.
Figured I'd ask here instead of creating a new thread.
I am looking for a dual sim phone to use where one would be Verizon and other sim would be AT&T. I don't care which sim gives me data as long as both get calls.
Would Axon 7 work for this? Thanks for any help.
Pr20 said:
Figured I'd ask here instead of creating a new thread.
I am looking for a dual sim phone to use where one would be Verizon and other sim would be AT&T. I don't care which sim gives me data as long as both get calls.
Would Axon 7 work for this? Thanks for any help.
Click to expand...
Click to collapse
Hello...yes... The Axon 7 should work in your use case most of the time as it can pick up CDMA 1X alongside WCDMA and LTE, the latter two of which are the technologies that AT&T uses. So, as long as you're in an active Verizon 1X area, and you keep the data SIM on AT&T, you should be able to pick up calls on both SIMs.
It is important to note, however, that Verizon does have some coverage areas which are dependent on voice-over-LTE for calls and text. So in these areas, you will not be able to receive voice service or texting on Verizon while using your AT&T SIM for data. But, these areas should be relatively rare, at least for now.

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