T-Mobile works on one G4 but not another? - Moto G4 Questions & Answers

I've got a SIM card from T-Mobile to try out and when I put it in my main G4 which has LineageOS 14.1, it will occasionally connect and toss packets back and forth but then disconnects and won't come back. I've tried messing with settings and triple-checking APN settings, nothing works. Tried the same SIM in another G4 that is stock and it works flawlessly, connects and makes calls, gets data, and holds a strong connection.
I don't get it. I even re-flashed the modem since I've had issues with that in the past. My main G4 has an AT&T SIM in it normally and that works great, has since I've owned it. Any ideas? Is this some kind of baseband issue or something?

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[Moto G4 with Amazon ads] Always losses carrier network after 24 hours

Hello everyone,
I just bought a Moto G4 16 GB with Amazon Ads for my wife, but we are facing a very annoying problem: the carrier signal always dies after 24 hours give or take. We tested with a different SIM card and the same thing happened. When this happens the device only shows "Emergency Calls Only" and we have to reboot the phone in order to get the signal back.
So, is anyone else facing this problem? Is this really a problem with this phone in particular or every moto g4 has this problem? Should I return the device to amazon?
Thank you very much for any information you can give me!
Zadornov said:
Hello everyone,
I just bought a Moto G4 16 GB with Amazon Ads for my wife, but we are facing a very annoying problem: the carrier signal always dies after 24 hours give or take. We tested with a different SIM card and the same thing happened. When this happens the device only shows "Emergency Calls Only" and we have to reboot the phone in order to get the signal back.
So, is anyone else facing this problem? Is this really a problem with this phone in particular or every moto g4 has this problem? Should I return the device to amazon?
Thank you very much for any information you can give me!
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No problems here since I got my phone last week and I have T-Mobile. You might have to check your apn settings with your carrier.
Caltinpla said:
No problems here since I got my phone last week and I have T-Mobile. You might have to check your apn settings with your carrier.
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Click to collapse
I tested the SIM card in a different phone and it worked flawlessly (I also use T-Mobile). The strange thing is that the phone gets the signal very well during more or less one day, after that I have to reboot to get signal again.
Well, this is probably a problem in the device. I already asked Amazon to send a replacement.
Zadornov said:
I tested the SIM card in a different phone and it worked flawlessly (I also use T-Mobile). The strange thing is that the phone gets the signal very well during more or less one day, after that I have to reboot to get signal again.
Well, this is probably a problem in the device. I already asked Amazon to send a replacement.
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Click to collapse
Try my APN settings to see if it helps, but locations very important
Zadornov said:
I tested the SIM card in a different phone and it worked flawlessly (I also use T-Mobile). The strange thing is that the phone gets the signal very well during more or less one day, after that I have to reboot to get signal again.
Well, this is probably a problem in the device. I already asked Amazon to send a replacement.
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Click to collapse
I also have the cellular data always active checked off
Caltinpla said:
Try my APN settings to see if it helps, but locations very important
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Click to collapse
Thank you, but I just use the t-mobile network. In fact, my carrier is called campusSIMs and it is a MVNO that uses t-mobile network. So, my APN configs are a bit different from yours.
However, I didn't know about this mobile data thing. I didn't touch the developer options. Maybe, it can be a good idea.
Thank you!
It won't be your APN settings since that controls your data settings. If the sim is ok then it could be your phone.
Sent from my SM-T530NU using XDA-Developers mobile app
I'm seeing a similar problem with the data portion of the network (also on T-Mobile). While I'm able to send and receive calls and texts, data doesn't work. There's no indication that it's attached to LTE or even 3G (just a standard signal bar with no other information). I moved the SIM card back to the old phone it was in and it works fine.
Things actually worked yesterday, so something happened overnight to break it.
Damaniel said:
I'm seeing a similar problem with the data portion of the network (also on T-Mobile). While I'm able to send and receive calls and texts, data doesn't work. There's no indication that it's attached to LTE or even 3G (just a standard signal bar with no other information). I moved the SIM card back to the old phone it was in and it works fine.
Things actually worked yesterday, so something happened overnight to break it.
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Click to collapse
That could possible be the APN settings. Although usually it's the opposite, they don't work at first then they update from the network later on. Most times the APN settings will set themselves but on the odd occasion they need to manually edited. I don't use T-Mobile but the APN settings are easy enough to find.
Damaniel said:
I'm seeing a similar problem with the data portion of the network (also on T-Mobile). While I'm able to send and receive calls and texts, data doesn't work. There's no indication that it's attached to LTE or even 3G (just a standard signal bar with no other information). I moved the SIM card back to the old phone it was in and it works fine.
Things actually worked yesterday, so something happened overnight to break it.
Click to expand...
Click to collapse
Sounds like you need to manually enter the APN settings. What you describe is exactly what happens when it hasn't loaded an APN.
I'm "kinda" having an issue here. It's a little different though; the phone works ok for a while (for me about 3 hours, usually), and then I still get an LTE indicator, but have no network connection (get errors in apps/"No internet" page in chrome).
Other times, I lose LTE and get locked in 3g (H indicator), and can only get LTE back by going to Settings/More/Cellular Networks/ and toggle preferred network mode to 2g or 3g, let it connect (H or E), then toggle back to LTE.
Motorola responded to a bad Amazon review requesting I post asking for help on their forums.
Relevant link:
https://forums.lenovo.com/t5/Moto-G...ction-with-LTE-and-strong-signal/td-p/3377242
I'm active over on their forums also and it's good to post over there in case you ever want to do a soak test. They look at your posts there when they ask for soak testers. As for your problem, I've seen it shift back and forth if you are in an area between towers and one isn't sending out LTE. If it were that I wouldn't think you'd get it back so easily. There's an app, don't remember the name, that will show the towers and signal relative to your location, If might be interesting to look at that.
Having the same issue with radio. Just replied to your post, Kalash.
Ok, we got a new phone from Amazon and it has the same problem. So, I believe this phone does not work very well with MVNOs.
I notice that the problem is that the phone cannot reconnect to the network after losing the signal. For example, if you go to an area with bad signal and, eventually the signal vanishes, the phone will not be able to reconnect to the carrier network. The phone only reconnects after reboot. Airplane mode does not solve the problem.
This does not happen with my Blu Life One X. So, I think it is a software problem.
Zadornov said:
Ok, we got a new phone from Amazon and it has the same problem. So, I believe this phone does not work very well with MVNOs.
I notice that the problem is that the phone cannot reconnect to the network after losing the signal. For example, if you go to an area with bad signal and, eventually the signal vanishes, the phone will not be able to reconnect to the carrier network. The phone only reconnects after reboot. Airplane mode does not solve the problem.
This does not happen with my Blu Life One X. So, I think it is a software problem.
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That's not true on all mvnos' apparently. My wife's phone is on Consumer Cellular, an AT&T mvno and it's never done that. We've been in a no service area several times and it's always connected immediately when getting service back.

[solved] No connectivity with cm14.1 (nightly 20161119)

Hi,
After upgrading my Oneplus Two from cm13 to cm14.1 (nighlty 20161116) my SIM worked and I could connect to GSM, LTE, etc. But after a few days it stopped working. I can still search for networks and I find the one I need. APN settings are correct and IMEI is correctly displayed in the settings. But there's no connection (no bars).
I'm out of ideas. Does anyone have a clue how to find out if my phone is the problem or CM14?
Did you make a clean flash?
Yousvel said:
Did you make a clean flash?
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Yes.
I made it to actually connect to the network again. But it seems that no traffic is going through. Sadly this only lasted for a couple of minutes. Now I can't connect again.
I'm facing a similar issue: data connections only work correctly when I use the primary SIM. Using the secondary SIM, I get slow Edge connections only.
Turns out I accidentally broke the antenna cable when I replaced my battery. I bought a new one and now it works again. So false alarm.

G935V on Android N 7.0 issues with receiving calls/texts [Total Wireless]

I have been going through a weird issue on Total Wireless. When I use Android 6.0.1 and below, I have no issues with my service at all, everything works as it should. The issue comes into play when I use any Android 7.0 ROM, be it official or custom. Outgoing calls/4G data are fine, but I cannot receive any phone calls or send/receive texts. The only way for me to be able to receive calls and send/receive texts is to dial out once. After this, everything works as it should, that is until I reboot. Then I it goes back to the partial working state until I dial out again.
The issue persists whether I am using CDMA/LTE or Global Network modes. I have tried every single possible combination of starting with a fully working 6.0.1 firmware and upgrading through Smartswitch, with and without a full Wipe performed afterwards, doing a full 7.0 firmware flash. The issue is always present, and I am not sure if TW has issues with Android 7.0 or if there is a problem with my account. Their CS is absolutely useless in helping me with the issue, and our chats always end with if I can make a phone call, then the issue is resolved. They don't understand that the issue is still present, but it only crops up after a reboot of my device.
I have tried 3 different SIM cards and they have deleted and re-added/reprovisioned my device/number to their system but nothing seems to help this issue. APN is the usual TRACFONE.VZWENTP. It's really weird that it happens on two separate devices that I activate with my mobile number.
My only thought as to what it could be is maybe some weird provisioning error with the number coming from Verizon. Total Wireless doesn't have any type of VOLTE capabilities on their network, yet I was able to use a rooted Note 4 device and activate Advanced Calling/HD Voice and I believe Wifi calling as well and use it fine on their service. One oddity I noticed is that when the phone is in the initial 'Searching for Service' state on a fresh boot when I dial out while connected to Wifi, sometimes I will see Mobile Network Type change to IWLAN, whereas it usually says LTE. After dialing everything works correctly.
Any ideas on further troubleshooting steps I can take? If nothing can be done, maybe there is some way I can have a boot up script that makes a ghost phone call to any random number and immediately disconnects so I don't have to remember to dial out whenever I reboot my device?
Thanks
I don't have a solution yet, but you're not alone. I have a stock G935V (running Nougat) with Tracfone service running over Verizon's network. Whenever I start up the phone, the phone will indefinitely remain in a "Searching for Service" status until I initiate one phone call. Then the network instantly switches to "Verizon Wireless" and everything works correctly for as long as the phone remains on.
A long phone call with Tracfone and Verizon yielded no solution: They indicated everything is configured correctly in my account. Various replacement SIM cards didn't change anything either.
This issue happens with both stock Samsung S6 phones and the Samsung S7 phone in my household. All are running Nougat.
Any update here? My girlfriend's phone has the same issue since moving from Verizon to StraightTalk.
dbldown7 said:
Any update here? My girlfriend's phone has the same issue since moving from Verizon to StraightTalk.
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Tracfone tried, half-heartedly, to solve the problem by sending me 3 different sim cards. The problem never went away. I just got in the habit of initiating a call to voicemail whenever I restarted my phone.
The problem went away when I upgraded my S7 Edge to Android v8 Oreo.
I have flashed the Nougat "U" firmware on my Verizon S7 Edge. I had VoLTE, hotspot, HD voice when calling someone on Verizon (but the HD symbol doesn't show on my dialer, only on theirs).
Only issue was that. when I introduced the TW SIM, the APN was auto set for Tracfone (and it wasn't working), so I had to manually change it to the TotalWireless one.
Since then I had received the Oreo upgrade and the following security update... and it's still OK.

Anyone have a working custom ROM on Verizon/Sprint or other CDMA network?

I have only been able to get a stock image running on my G5 Plus. I can then load Magisk and get by but would really like to run PureNexus or RR. Every single custom ROM I have tried complains that the SIM card is missing on initial install which you can simply ignore and get the phone to basically work but you can never update your PRL or account settings over the network as the app just crashes the instant it's selected. And please don't tell me I need to insert a SIM card, of course there is a SIM card inserted it just can't see it.
Is there any US based developer out there with a G5+ on CDMA.
Maybe I am just missing something obvious but I don't see what it could be. My SIM is activated and works perfectly with the stock deodexed ROM.
Yes works fine on Verizon . My problem is the about phone has my device a xt1687 but I think it needs to be Moto g 5 plus to allow me to watch my movies I buy through Google
I'm with Verizon and like you I had a huge hassle getting LTE to work on any custom ROM except Pure Nexus. I think I tried at least 10 different custom ROMs and they all had the same issue upon the initial boot complaining about the SIM card, I simply skipped it of course. All the ROMs wanted to then just give me a constant 3G signal and no LTE. I tried a few things but ultimately all the ROMs started getting LTE and then I figured out that maybe I found the fix by luck. I'd logged onto Verizon and looked at some settings and noticed my phone showed up as a default device name. I simply changed that to something else and perhaps that fixed the issue while I was flashing all these ROMs.
Now my problem is different....it's backwards. LTE works great until i get in a rural area and then the phone wont change down to 3G or 1x. No signal at all for phone or text until get back into an LTE area. I think these issues have to be related to the APN settings the custom ROMs (except Pure Nexus) are using. I would like to copy all the APN related files from the stock ROM which works perfectly over to a custom ROM but I'm unsure of which files to copy. Try changing your device name on Verizon to see what happens after a few minutes. Worth a shot...

T-Mobile works on one G4 but not another?

I've got a SIM card from T-Mobile to try out and when I put it in my main G4 which has LineageOS 14.1, it will occasionally connect and toss packets back and forth but then disconnects and won't come back. I've tried messing with settings and triple-checking APN settings, nothing works. Tried the same SIM in another G4 that is stock and it works flawlessly, connects and makes calls, gets data, and holds a strong connection.
I don't get it. I even re-flashed the modem since I've had issues with that in the past. My main G4 has an AT&T SIM in it normally and that works great, has since I've owned it. Any ideas? Is this some kind of baseband issue or something?

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