Database Users

[Q] Can't get I337 to work with Verizon after following unlock guide.

I have a SGH-I337 (AT&T) that I'm trying to get to work with a Verizon sim. I followed the steps in the post below.
http://forum.xda-developers.com/gal...aranteed-free-sim-unlock-mk2-nb1-nc1-t2852979
I follow the steps as stated but at the end the phone has no signal/loses signal using Verizon sim's.
Usually after a fresh boot, the phone will have bars but no data and cannot make calls. The phone states EMERGENCY CALLS ONLY at this point. After a few minutes the service bars will disappear and be replaced with a NO SERVICE indicator.
The phone no longer indicates an invalid sim, but does not auto load APN settings. Manually inputting the Verizon APN settings does not fix it either.
I have checked and it does NOT show the NULL IMEI on the *#06#. Also with the Verizon sim the hidden menus don't always function (*#0011# and such) although I've read that is an AT&T only thing, I'm not sure if that true.
When I insert an AT&T Sim it gets service/data immediately upon booting. I've also tried two different Verizon sim cards.
Thoughts or Suggestions? What am I missing?

VTAssault said:
I have a SGH-I337 (AT&T) that I'm trying to get to work with a Verizon sim. I followed the steps in the post below.
http://forum.xda-developers.com/gal...aranteed-free-sim-unlock-mk2-nb1-nc1-t2852979
I follow the steps as stated but at the end the phone has no signal/loses signal using Verizon sim's.
Usually after a fresh boot, the phone will have bars but no data and cannot make calls. The phone states EMERGENCY CALLS ONLY at this point. After a few minutes the service bars will disappear and be replaced with a NO SERVICE indicator.
The phone no longer indicates an invalid sim, but does not auto load APN settings. Manually inputting the Verizon APN settings does not fix it either.
I have checked and it does NOT show the NULL IMEI on the *#06#. Also with the Verizon sim the hidden menus don't always function (*#0011# and such) although I've read that is an AT&T only thing, I'm not sure if that true.
When I insert an AT&T Sim it gets service/data immediately upon booting. I've also tried two different Verizon sim cards.
Thoughts or Suggestions? What am I missing?
Click to expand...
Click to collapse
I don't own any Verizon phones myself, so I could be totally wrong but:
- Verizon's SIM cards are just for data.
- Verizon uses CDMA (Your subscriber identity is in the ESN/IMEI)
- AT&T uses GSM (Your subscriber identity is in the SIM)
Both networks require you to authenticate yourself with your subscriber identity before they will give you data access.
Sounds like Verizon doesn't have your IMEI, so the phone fails to authenticate/connect.
Try calling Verizon, tell them you got a new phone, and you would like to tell them the IMEI of the new one, so that it can connect to data services.
Either that or they need the number off the Verizon SIM

jdisco1 said:
I don't own any Verizon phones myself, so I could be totally wrong but:
- Verizon's SIM cards are just for data.
- Verizon uses CDMA (Your subscriber identity is in the ESN/IMEI)
- AT&T uses GSM (Your subscriber identity is in the SIM)
Both networks require you to authenticate yourself with your subscriber identity before they will give you data access.
Sounds like Verizon doesn't have your IMEI, so the phone fails to authenticate/connect.
Try calling Verizon, tell them you got a new phone, and you would like to tell them the IMEI of the new one, so that it can connect to data services.
Either that or they need the number off the Verizon SIM
Click to expand...
Click to collapse
I really do hope it's this simple. I'll try it tomorrow and let you know if it works.

I've never heard of a gsm phone working on cdma. Is it even possible?

Airtioteclint said:
I've never heard of a gsm phone working on cdma. Is it even possible?
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Click to collapse
Me neither, but maybe since its unlocked? Plus it has an IMEI for Verizon to use...

jdisco1 said:
Me neither, but maybe since its unlocked? Plus it has an IMEI for Verizon to use...
Click to expand...
Click to collapse
It should be able to work with CDMA. I've seen the option in some of the menu's I've been through. And the guides have all said that they can work between AT&T and Verizon/T-Mobile or vice versa.
Also, AT&T will unlock the phone for you if you go to their website and fill out the stuff. The only reason I didn't do this is because I'm still under contract and I would have to break that and pay the early termination fee.

How to use on MetroPCS network

I've read through the forums and see that it's possible to use the Verizon note 3 on tmobile network. I want to use mine on the MetroPCS network. My question was is has anyone switched theres from Verizon to metro pcs and if so what are the steps involved?
Sent from my SCH-R720 using Tapatalk 2

Answer + another question
Hey there. I'm going to try and answer your question and then ask another related question.
I recently bought a 900v from eBay with the intention of using it on MetroPCS and then in Europe after a few months when I move. I'm currently using an international Note II on MetroPCS which works fine.
To answer: In theory, as far as I know, all you need to do to get your Verizon Note 3 to work on MetroPCS is get a plan and SIM card from them (they will need to register your phone's IMEI to the SIM card since they lock individual SIM cards to individual phones). After this, go to Settings > More networks > Mobile networks and change preferred to 'global'. You will also need to input the proper network name and APN (Settings > More networks > Mobile networks > Access Point Names). From here it should work.
Ok, now my question for whoever might know something about it. Since I bought my Note 3, I went to a MetroPCS store and had them change the registration from my old phone's IMEI to the Note 3. They did that, we switched the SIM and did what I wrote above and voice and text worked, but no data. The guy working there didn't know what to do, so I decided to have him just switch it back to my Note II and I'd take it to the better resourced 'corporate' store later.
In the meanwhile, I rooted and did what I needed to flash JasmineRom 2.4.1. Went fine and everything seemed to work fine. Then I took it to the corporate store. They tested it with a tester SIM first (not locked to a particular device) but couldn't get it to connect to a network and then the same with my SIM (which had worked before at least for voice). I just get the notification: "Phone Activation - This SIM card is from an unknown source."
Does anyone know if the phone has to first be somehow Activated with Verizon before I can change it to global and use other GSM networks? If so, how would I go about doing that as I'm not on Verizon, nor have I ever been. I have a friend who uses Verizon who might be able to help me activate it if really necessary, but if there's another way, do please let me know. If this problem has nothing to do with activation, and there's something else going on, I'm all ears as well. Thanks.

Problem solved for MetroPCS connection.
Just wanted to update that my problem was solved with no more trouble than calling MetroPCS (888 8METRO8) to have them register my old MetroPCS SIM card to my new device (Verizon Note 3). I had already played around with GSM and global modes and had manually input the APN and network name prior to calling. I had also tried to activate using *228 but that didn't seem to work... not sure if that is important but it was something I had done (with the MetroPCS card before calling).
To the OP: did you get yours working?
Edit: I suppose it is also worth mentioning that I didn't have to change any settings and I'm getting 4G LTE on MetroPCS.

So to confirm, it is possible to connect the Verizon note 3 to METROPCS network and get 4G LTE SERVICE. Will I need to adjust APN settings through the phone? Do I have to use a separate program to change those settings?
I'm going today to try to set this up. Thanks for the responses.
Sent from my QMV7B using Tapatalk

Ok everyone I have a question in reguards to using a Verizon Samsung Galaxy Note 3 with Metro PCS. I've been getting the run around from Verizon and Metro. What I've done so far is got Metro PCS to type the Note 3's IMEI number in their computer to activate the phone (like they do with every phone). I put the SIM card in the Note 3, and it said something like "SIM card is from an unknown source" (it's not reading the SIM). The phone wouldn't work. No service despite them activating the Note 3 on my account. They told me to go to metro store, so I did and we tried a new SIM card and everything and it still didnt read it. I keep seeing people say we need to change the APN, but what are we specifically supposed to write in the APN box? Also, I see people saying metro has to do something with the SIM card, what exactly do they have to do? Can someone please help, and please give me the exact steps as to what I have to do to get my Note 3 activated and working with MetroPCS. I havent had a phone to use in days because of this bullcrap please help!

verizon phone on metro network
graphmatix said:
i've read through the forums and see that it's possible to use the verizon note 3 on tmobile network. I want to use mine on the metropcs network. My question was is has anyone switched theres from verizon to metro pcs and if so what are the steps involved?
Sent from my sch-r720 using tapatalk 2
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i tried doing this today and i was told if the verizon phone was activated...it would only last about 2 weeks..

Would this work on a galaxy s5?

Uscellular g4 with tmobile sim

I dont know if anyone else has tried this but i popped in my tmobile sim into my uscellular g4 and had service the only thing i had to add was the apn

This is without a sim unlock bought the phone 2 days ago and been using it was going to get a sim unlock but apparently it works just fine without it on tmobile.

Just to show that its a uscellular g4

Are you getting full speed LTE?

Yes doesnt seem to be a problem only thing i noticed is it wont let me make calls and or text but it will let me use data

When i make a call it tells me its an incorrect sim so i think if i unlock it will allow me to make calls and texts but as i said previously itll let me use data no ptoblem

I had heard that some CDMA phones may not allow phone calls or texts, you should look into finding a way to disable the CDMA, it may or may not work.
I think calls and texts are going through the CDMA and not GSM.

I have to agree i think if i sim unlock it that it will allow me to bypass the cdma part of the phone uscellular said after i pay the phone off i could get the sim unlock for it

No need to sim unlock, it already is, most new phones from verizon are already sim unlocked and some other carriers as well, only help is probably trying to disable the CDMA in the hidden menus and probably enabling gsm.

I agree with @Arctic Prodigy, you should be able to make calls texts, just by changing something in Settings. On my One Plus for instance (the only device I have handy, sorry) go to Settings > Mobile Networks > Preferred Network Type and then change from CDMA or whatever it is set to, to GSM/UMTS or something similar to that if it's available. To reach this menu on your device it may be slightly different in Name or location but it should be there somewhere. A friend of mine had a VZW s4 and I told her she could use a straight talk sim in it. She had issues at first but I do remember I changed this setting I mentioned above from whatever form of CDMA setting it was on to GSM and it has been working fine ever since!
I would think if it were sim locked, then you most likely wouldn't get data after setting Apn. This tells me it sees the tmo sim and that you have active service, so it is allowing phone to use the data connection.
Hope this helps!
Sent from my A0001 using XDA Free mobile app

It has these and i changed itto global and gsm/umts and still vouldnt make calls or texts

It tells me when i make a call its an invalid sim even after changing it to global or gsm/umts

But like i said it lets me use data so ill have to do some digging i used to dev for the note 4 so ill have to learn lg's a little shouldnt be to hard

I know the T-Mobile iPhone 6 has CDMA as well but it is disabled, regardless of changing in the settings to gsm/umts it still maybe trying to go through CDMA, you need to disable CDMA and enable gsm in the hidden menus and if you get it to work that way you may need to reset it if you reboot phone.

The problem is i havent been able to ascess the hidden menus ive tried all the known lg hidden menu codes

I am positive it will happen soon, I have seen a posting somewhere here for the hidden menu but it still might not be accessible just yet, but a developer will get it soon enough, I know for the LG G2 or G3 the CDMA phones all have been patched to get gsm. It's only time now.

Well if i can put a few heads together that have a uscellular G4 im sure we can access the hidden menu for the uscellularG4

Try 277634#*#
Also found this link http://androidforums.com/threads/how-to-turn-4g-on-off-access-hidden-menus.638374/

That doesnt open anything at all for me

It seems to be working only on some of the G4's but not all.

Someone with a little more experience tell me what I'm doing wrong here please.

This is probably something silly and small but I'm pulling my hair out trying to fix this. I bought a G4 play XT1607 unlocked from Best Buy the other week. I also purchased a tracfone SIM activation kit. The kit had 2 sim cards, one GSM and one CDMA. Since I used Verizon service previous to my foray into prepaid plans, I activated the phone with the CDMA SIM card and registered the IMEI with Tracfone. Then I was able to successfully unlock the bootloader following the motorola official procedures, put on TWRP and flashed a LineageOS ROM w/ SU and OpenGAPPS. It worked fine for a couple of days and then *poof* my internet data would no longer connect at all. I rebooted several times and got nothing.
I then saw that there is some LTE/wifi handoff bug and I figured, no biggie, I'll swap my tracfone service to the GSM SIM and pop it in and it'll be good to go. Not so. At first, in fastboot, the screen was saying <Baseband not found> and I couldn't even place a phone call. The phone still doesn't seem to recognize the SIM card and doesn't show any cellular connectivity. I've tried flashing AOKP, LineageOS (both 7.1) and the stock 6.0.1 deodexed several times. I've tried this thread here and using it's 2.35-1 Radio file with the above ROMs which I installed using TWRP as well. None of this is seeming to work so I called Tracfone and they said it should be working and must be on my end. So following this I decided to go fully to flash fully back to stock. I used this file:
https://mirrors.lolinet.com/firmware/moto/harpia/official/RETUS/
and followed these directions
https://forum.xda-developers.com/g4-play/how-to/guide-return-to-stock-firmware-recovery-t3551797
Phone seems to be working fine other than not getting any kind of cellular signal. Even though it should be "factory fresh now" When I called tracfone they didn't seem to sure of themselves and told me it would activate within 2 hours and to call back if I had issues. It's been 4 hours now an dNo sign of signal. Did I mess something up here? Does tracfone need to do something on their send since this phone/IMEI was used previously on their service as CDMA? Or can I just "pop the new SD card and go" Or do I just need to add something like APN settings or similar to get what I have working? I don't want to call tracfone again if I don't have to because they didn't seem to know what to do when I explained it to them and sounded incredulous that one phone did both CDMA and GSM to begin with.
Can anyone help me? I'd like to use this GSM SIM card in my unlocked XT1607 (RETUS). This phone was previously on the same tracfone account with the same phone number but on their CDMA network. What gives? Is this something I messed up or tracfone needs to deal with?

I did some more research and I'm pretty sure this is on Tracfones end. I believe they still have it registered as a CDMA device and it's ignoring my GSM SIM when I turn it on.

Truculent said:
I did some more research and I'm pretty sure this is on Tracfones end. I believe they still have it registered as a CDMA device and it's ignoring my GSM SIM when I turn it on.
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I don't think that's the issue. Did you set an APN for Tracfone? With the GSM SIM, you have to configure the APN.
Tracfone's site says to go to apn.tracfone.com but that site gives an error. I did find this: http://apn-settings.com/tracfone-apn-settings-step-by-step-configuration-guide/
Or you can check on Howardforums or Turks.

Also G4 Play, also Tracfone BYOP. I, however, did GSM from the getgo to avoid something like this. On my phone, when I installed Lineage, my MEID disappeared entirely (it only shows my IMEI in settings). SIM card reads just fine and APN settings are fine. I do think the initial ROM you installed inhibited the device's ability to read its own MEID (everything hints at these ROMs being made specifically for dual-SIM GSM phones). However, switching to the GSM SIM should have worked, provided you actually transferred your number and didn't just pop the other SIM in (the MEID on the Red "BYOP" card would have needed to be decommissioned).
Here's a thought: Try dialing *22890 on the phone. If it says the phone is programmed for CDMA service, then that could be part of the issue. Also check Settings to see if you have both an MEID and IMEI, or just an IMEI. If your IMEI is 0, then the SIM Card is not being read and they need to ship you a new one.

bw 1 said:
I don't think that's the issue. Did you set an APN for Tracfone? With the GSM SIM, you have to configure the APN.
Tracfone's site says to go to apn.tracfone.com but that site gives an error. I did find this: http://apn-settings.com/tracfone-apn-settings-step-by-step-configuration-guide/
Or you can check on Howardforums or Turks.
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Click to collapse
Just to follow up, I did find the correct web page for Tracfone APN: https://www.tracfone.com/apn

Posting for reference. APN is RESELLER/reseller.

Issue deleting T-Mobile APN and adding a new one

I have an old On5 that I rooted several years ago. I just got I an S10 and transferred my On5's plan and number over to it. Wanting to use the On5 as a backup phone, I bought a cheap, supposedly T-Mobile compatible $5 SpeedTalk pay-as-you-go sim card for the On5 and managed to get it activated online. The phone recognizes the activation, but SpeedTalk requires using it's own APN.
My problem is the 'T-Mobile US LTE' APN is fixed. In 'Mobile Networks > Access Point Names > T-Mobile US LTE > More' the settings are all grayed out and 'Discard' option does not respond to deleting the APN. I can add a new SpeedTalk APN, but I can't set it as default. Searching the forums on this only came up with an old related issue, but nothing specifically on a locked T-Mobile APN like this.
Would anyone know if this can be hacked or reset to new APN?

If it helps anyone, I found a post in the forums here that solved the problem by going to mobile networks/network operators/default setup and choosing manual before attempting to add a different apn. Also had to disable 'Select Automatically'