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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.
I decided to install a new ROM on my HTC HD2, i had android 2.3.3...
I try already 4 different's, but with all i have the same problem (No SIM Card detected)
I install different kernel, different's radio, different's magldr... I try pretty much everything.
I have a HTC HD2 from T mobile, but i'm using mobilicity sim card...
Please i need help...
Thanks...
Have you tried formatting with a pc using SDFormatter V3.1 to fat32 file system?
If not do....
Edit: Too much of the wackey backy, thought I was replying to another thread!!
sounds silly, but, , ,are you sure its not just a badly seated sim? have you tried a different sim in it? tried your sim in a different phone?
It wouldnt be the first time someone put a sim in back to front....
samsamuel said:
sounds silly, but, , ,are you sure its not just a badly seated sim? have you tried a different sim in it? tried your sim in a different phone?
It wouldnt be the first time someone put a sim in back to front....
Click to expand...
Click to collapse
Hi, thanks for the answers, but i already try to format in fat32, didn't work...
I try my sim in another phone that i have e works fine, i try my wifes Sim in my phone and it nothing...
So what i think is, because i use Mobilicity and they use "The network uses the UMTS IV frequency band, also known as AWS, to provide UMTS (with HSPA) service.[16] Using this band, user equipment transmits at 1710–1755 MHz, and receives at 2110–2155 MHz. AWS is the same frequency as Wind Mobile and Videotron in Canada and T-Mobile USA. Like WIND and Videotron, Mobilicity does not have a 2G, EDGE, GPRS GSM Network."
My phone because, i don't know what, stop working in this frequency...
Please help me...
Thanks
I'm having the same problem, intermittent detection of SIM card, mostly NOT detecting it!
The SIM works fine in a duplicate LEO, running exact same ROM. And yes, the phone is unlocked.
Do the card holders in the phone fail? How likely is this?
Peace
---------- Post added at 09:54 AM ---------- Previous post was at 09:40 AM ----------
Looking at Settings > Personal > Security and Privacy Settings > Set up SIM card lock > on the non-working phone the SIM lock is on but not on the other.
How do I disable the lock? Well, obviously by inputting the SIM code but what is it? Even without the SIM it is requesting a code, but I have no idea what it is....
Peace
Am I being really thick here and this is telling me the phone isn't actually unlocked to my network?
Peace
Sent from my phone using xda premium
hello
my friend have used phone from t-mobile usa
and the phone can't read any sim except orange israel (don't know about t-mobile sim)
how can it be ?
and how it can be changed that the phone will read all the sims ?
now when i try to put any sim i got message "sim card not found"
This phone requires a certain type of SIM. Different SIMs have different shapes and sizes of contact area for the chip. Compare them and you'll see what I mean.
estallings15 said:
This phone requires a certain type of SIM. Different SIMs have different shapes and sizes of contact area for the chip. Compare them and you'll see what I mean.
Click to expand...
Click to collapse
thanks for your answer
than there is anything to do to solve this ?
from 7 different carriers orange israel will be the only one will work on this phone?
btw . i now see other post you talked about the sim sizes...
in my case the sim size is identical
but i think the chip size is different
the one that work have a larger chip
look at the bottom of the sim and make sure the metal contacts are in the same place as the tmobile sim (look up a picture of tmobile sim on google if you need it) otherwise its possible that the phone is not sim unlocked
from what i see it's not on the same place as t-mobile sim
just orange israel sim is the same as t-mobile
benhouli said:
from what i see it's not on the same place as t-mobile sim
just orange israel sim is the same as t-mobile
Click to expand...
Click to collapse
Take a working SIM to the carrier you want it to work with and see if they will sell you a SIM that matches that type.
estallings15 said:
Take a working SIM to the carrier you want it to work with and see if they will sell you a SIM that matches that type.
Click to expand...
Click to collapse
i don't think they have that type of sim
because they new carriers that sell just the new one
there is no service that can unlock it to work with all the sim cards types ?
or this is done deal ?
It not the carrier type that is the issue. This is the hardware on the mobo. If your SIM reads, but the phone is carrier restricted then it will tell you. Unless you are getting a message to that effect this is H.A.R.D.W.A.R.E.
estallings15 said:
It not the carrier type that is the issue. This is the hardware on the mobo. If your SIM reads, but the phone is carrier restricted then it will tell you. Unless you are getting a message to that effect this is H.A.R.D.W.A.R.E.
Click to expand...
Click to collapse
as u said , i am not getting any requset to put any pin or puk or any unlock code...
but there is one carrier that the phone read his sim card (with the bigger chip on the sim card), but it's just 1 from 7 carriers , because the others have different types of sim cards.(the one with the smallest chip on the sim card)..
what about cellphone labs ? they can't replace the part that read the sim to one that can read all the types of the chips (that on the sim cards)
i am the first that stuck with that problem ?
i really don't want to buy another phone
i like that phone
there is no solution for this hardware problem ?
thanks
Cell phone labs? What? Dude it's part of the motherboard. It's engineered for and soldered to the motherboard. You just need the correct style of SIM card.
There are dual SIM adapters out there that MAY work. You could try that, but it will require cutting of the SIMs to make them fit under the battery.
estallings15 said:
Cell phone labs? What? Dude it's part of the motherboard. It's engineered for and soldered to the motherboard. You just need the correct style of SIM card.
There are dual SIM adapters out there that MAY work. You could try that, but it will require cutting of the SIMs to make them fit under the battery.
Click to expand...
Click to collapse
thanks again
i don't know why they bother to release phone that accept just one type of sim
that most of the phones can accept all the types
I brought S4 just another day and when I insert sim card the phone says "No sim Card" but I inserted it already!
Its micro sim i'm buying another sim card today and see if it works,
Will customer service fix this if the problem is in the phone ? If yes then is it covered by warranty ?
Any help? maybe its software problem
Julius Palad said:
I brought S4 just another day and when I insert sim card the phone says "No sim Card" but I inserted it already!
Its micro sim i'm buying another sim card today and see if it works,
Will customer service fix this if the problem is in the phone ? If yes then is it covered by warranty ?
Any help? maybe its software problem
Click to expand...
Click to collapse
Definitely. Visit SSC.
BTW, use this thread http://forum.xda-developers.com/showthread.php?t=2192886 from next time to ask anything related to S4.
zzz
You didin't even answer my question, my question is is this hardware problem or sim card problem?
Julius Palad said:
You didin't even answer my question, my question is is this hardware problem or sim card problem?
Click to expand...
Click to collapse
And how exactly he should or anyone should know what's exactly your problem? Can be hardware or the simcard. This is up to you to find out.
First try a new simcard , and try to get one micro sim factory cut if you can, if still nothing means is hardware.
Did you put it in wrong?
Sent from my Nexus 4 using xda premium
I have the same problem on my s4, it doesnt recognize any sim at all. i tried several simcards but with no success
daahir said:
I have the same problem on my s4, it doesnt recognize any sim at all. i tried several simcards but with no success
Click to expand...
Click to collapse
You have the answer on this topic, if doesn't work with any simcard, bring it back.
GT I9505 doesn't detect LTE sim, works fine with 3g Sim
Hello all !
I own a 2.5 year old GT i9505 (LTE variant) which works completely fine with a 3g Sim but the "Sim Card not inserted" error appears as soon as a 4g Compatible Sim is inserted. Could this be a modem issue ?
I live in India (got the phone from Europe) and have been using 3g services without any hitch for the past 2 years. Vodafone recently launched 4G services here and my phone doesn't detect the new 4G Sim card .
My phone shows the LTE/WCDMA/GSM modes but doesn't detect the Sim card.
Tried with another Sim from the store that doesnt work either.
Details :
AP: I9505XXUHOJ2
CP: I9505XXUHOJ2
CSC: I9505EURHOJ1
All ideas and solutions are appreciated.
It's possible that there is something wrong with the phone's sim card reader. You could replace the reader for not a lot of money and it's easy to do yourself.
Maybe your phone is unable to detect LTE Networks from Vodafone India because from what I research, India uses TDD-LTE. You could Google-d LTE bands that used in India and compare it with your phone's supported LTE bands.
Sent from my GT-I9500
audit13 said:
It's possible that there is something wrong with the phone's sim card reader. You could replace the reader for not a lot of money and it's easy to do yourself.
Click to expand...
Click to collapse
Thanks for your reply.
I considered that option but a 3g sim works perfectly. Do you still think it would help ?
krasCGQ said:
Maybe your phone is unable to detect LTE Networks from Vodafone India because from what I research, India uses TDD-LTE. You could Google-d LTE bands that used in India and compare it with your phone's supported LTE bands.
Sent from my GT-I9500
Click to expand...
Click to collapse
Thanks for your reply.
I guess I am just lucky my phone supports both.
http://www.cnet.com/news/why-your-next-4g-phone-should-have-fdd-lte-and-tdd-lte/
Still no luck !
I don't know that much about sim card technology. Have you tried the LTE sim card in a very old phone to see if the old phone detects the sim?
audit13 said:
I don't know that much about sim card technology. Have you tried the LTE sim card in a very old phone to see if the old phone detects the sim?
Click to expand...
Click to collapse
I did infact it works with every phone except this one.
Leads me to conclude it is the sim reader or motherboard if no LTE SIM cards work. Doesn't seem like software.
HI EVERYONE,
Hope you can help me or give an advice...
I got Xperia Z5 Dual Sim Card phone. I'm on UK network. If I use both sim slots with the same provider, one of the slots stops working immediately. Shows no signal bars whatsoever. As soon as I use two different sim cards from different providers, both work fine. I called my network provider, but they state it's a phones fault.
Has anyone experienced anything like that?
Can you buy new sim card? And try with the new one
Sent from my E6653 using Tapatalk
Could it be your carrier doesn't have GSM coverage in your area?
I think 3 in the UK does not have GSM. When you are in 'dual standby' mode one of the SIM cards MUST be on GSM only mode, therefore if your carrier doesn't have GSM it will never connect. This is a funny limitation, but it's what allows for dual standby phones to be made relatively simple without having to have two radios for two carriers, which would make the phone a lot bigger and complicated.
I went to the actual store and swapped the sim cards, but nothing helped
bartolo5 said:
Could it be your carrier doesn't have GSM coverage in your area?
I never thought of that... It's strange as I went to Vodafone store and they said they don't support dual sim card phones at all.
I am actually with network 3, so thought there shouldn't be issues like this. Another funny thing is, that if I swap the slots with the same network 3 sim cards, sometimes slot No1 and sometimes slot No2 isn't working. As soon as I put one Vodafone and the other network 3 sim cards, both slots work just fine
Click to expand...
Click to collapse
NewToWeb said:
HI EVERYONE,
Hope you can help me or give an advice...
I got Xperia Z5 Dual Sim Card phone. I'm on UK network. If I use both sim slots with the same provider, one of the slots stops working immediately. Shows no signal bars whatsoever. As soon as I use two different sim cards from different providers, both work fine. I called my network provider, but they state it's a phones fault.
Has anyone experienced anything like that?
Click to expand...
Click to collapse
I used my Z5 Dual when I was in the UK and was having real problems getting the EE sim card to work on the data side, it seems that when I put in the EE card my phone restarts (annoying but standard) and it resets the data preference to 3G which meant that I had no coverage. As soon as I switched the data preference to LTE it was up and running full guns again.
Phoomeister said:
I used my Z5 Dual when I was in the UK and was having real problems getting the EE sim card to work on the data side, it seems that when I put in the EE card my phone restarts (annoying but standard) and it resets the data preference to 3G which meant that I had no coverage. As soon as I switched the data preference to LTE it was up and running full guns again.
Click to expand...
Click to collapse
Thanks for you answer. Seems that it's more to do with the provider then the actual phone.
Sad that phone like this couldn't be used to it's full potential