I recently lost internet access on my Galaxy Nexus running Android 7.1.2 (Lineage 14), possibly in connection with removing an international dialing cost plan on my AT&T account using their website on a desktop computer. Since then the previous APN setting wap.cingular no longer works. I have spoken with AT&T support three times without getting this resolved. Today we tried the APN nxtgenphone, phone and wap.cingular, none worked. Wifi works fine and I have not done any update of the system software.
Is anyone using their GN phone on the AT&T network, if so, what are your APN settings?
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I have a AT&T galaxy s 3 since the beginning it appear. Unlocked through ATT Costomer service . I am using straight talk service. it was working fine when it was ICS OS .but after i update to jellybean i found a problem that APN remove automatically whine i connect to home network wi-fi. by this time i always have to set apn and go outside. is any body having this problem or any suggestion.i mean to say APN automatically delete when i connect to wifi.
thanks
I am using custom/dedicated APN from ATT and Tmobile for work. I have 3 tab 7.0 inch from ATT (SM-T217A). I am testing this before purchasing more.
All three units are from ATT. I do not have any tablets from T-mobile currently. On ATT APN I2gold, I have set it up and it work as expected, however the tablet switches back to default ATT broadband APN often like every 10 minutes, not suitable for the business. Unlocking my SM-T217A and using it on Tmobile with Tmobile custom APN that works and it does not change it always stays on the dedicated APN(b2b.tmobile.com) which is what my goal is with ATT and ATT device.
To summarize, ATT Device with Tmobile Sim works on APN I input, I believe Tmobile Device on ATT Sim Card would have the same result.
Is is possible to delete default APN from ATT on ATT device? I just want to get rid off ATT Broadband APN and their Activation APN.
Found a solution deeply searching into it
http://forum.xda-developers.com/showthread.php?t=1330087.
It seems to work for me.
I have a T-Mobile branded LG G3 on T-Mobile's network. I was using usb tethering while testing a mother board about a week ago, and after disconnecting my mobile data connection wouldn't work. I got it working after a couple of days by partially putting in a dummy apn setting. When I say a dummy apn, I mean that I only gave an APN name, and "fast.t" for the APN, not even the full address. When switching to this apn, my lte connection immediately popped up and things seemed fine. But after a few days I realized that I'm unable to send mms messages. Text messages have worked, but no mms. I've tried entering the complete apn settings, and now I have no data connection at all. I've tried resetting network connections, and that didn't help either.When resetting, I have the default T-Mobile LTE apn, and another EDGE MMS apn, but the EDGE MMS apn has no way to select it. It's just there, and neither allow modifications. I'm running 6.0 stock, rooted, and TWRP recovery. I've made no system modifications beyond root and recovery. Anyone know of some suggestions? I haven't come across any apn issues resembling my specific issue from other users.
I have a Galaxy S9 (SM-960U) purchased from T-Mobile, but unlocked and running with an AT&T SIM (among others, at times). Up until today, the phone was running the stock T-Mobile ROM which received various software updates on a monthly or every two month interval. I've installed them as they were released (while running various non-T-Mo SIM cards) and the latest was October 1, 2018. Today, I clicked the "Software Update" function and saw that a new update was available. When it installed and restarted, I noticed that the phone was running an AT&T branded ROM, along with the typical AT&T bloatware (e.g., CNN, Groupon, Amazon, AT&T-specific apps) that was not previously installed.
The other thing I noticed was that the phone now is only connecting to HSPA and HPSA+ networks, whereas before it would also connect to LTE.
I'm not sure why I suddenly received and installed an AT&T-branded ROM today when my S9 and all of my previous devices were fine running the T-Mo ROM and receiving updates as they were released. Does anyone have any insights as to what caused this change and whether future ROM updates will be carrier-specific based on the inserted SIM? In the past month I've used SIMs in Vietnam and Japan and it seems odd that ROMs would suddenly be based on the carrier of the day.
Also, any ideas about restoring LTE service? I've tried removing the SIM and powering off the device a few times, but no dice. This was a network/account-problem when I initially ported over to AT&T from T-Mo which took a lot of troubleshooting at the store (unsure of actual root cause), but it seems odd that a software update on the device would undo that.
The latest update (3BRJ5) is BYOD firmware. With B firmware, a carrier sim will change the csc of your phone to match the network you are connected on. Good luck getting LTE back, I have no idea on that.
*#*#4636#*#* entered into phone dial. That will allow to select preferred network type in device information.
jasonw3 said:
I have a Galaxy S9 (SM-960U) purchased from T-Mobile, but unlocked and running with an AT&T SIM (among others, at times). Up until today, the phone was running the stock T-Mobile ROM which received various software updates on a monthly or every two month interval. I've installed them as they were released (while running various non-T-Mo SIM cards) and the latest was October 1, 2018. Today, I clicked the "Software Update" function and saw that a new update was available. When it installed and restarted, I noticed that the phone was running an AT&T branded ROM, along with the typical AT&T bloatware (e.g., CNN, Groupon, Amazon, AT&T-specific apps) that was not previously installed.
The other thing I noticed was that the phone now is only connecting to HSPA and HPSA+ networks, whereas before it would also connect to LTE.
I'm not sure why I suddenly received and installed an AT&T-branded ROM today when my S9 and all of my previous devices were fine running the T-Mo ROM and receiving updates as they were released. Does anyone have any insights as to what caused this change and whether future ROM updates will be carrier-specific based on the inserted SIM? In the past month I've used SIMs in Vietnam and Japan and it seems odd that ROMs would suddenly be based on the carrier of the day.
Also, any ideas about restoring LTE service? I've tried removing the SIM and powering off the device a few times, but no dice. This was a network/account-problem when I initially ported over to AT&T from T-Mo which took a lot of troubleshooting at the store (unsure of actual root cause), but it seems odd that a software update on the device would undo that.
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Click to collapse
you have to change APN setting on the menu to reflect AT&T network. let me know if it works by changing APN.. I used to have S9+ tmobile and I was waiting for this BYOD update but i traded in my s9+ already =/ i have note 9 unlocked now..
skyethur said:
you have to change APN setting on the menu to reflect AT&T network. let me know if it works by changing APN.. I used to have S9+ tmobile and I was waiting for this BYOD update but i traded in my s9+ already =/ i have note 9 unlocked now..
Click to expand...
Click to collapse
The issue required a visit to the AT&T store, where they replaced the SIM and reset some of the network features on the back end of my account. This required a call to the retail technical support team and about 45 min. No settings were changed on the phone. The APN settings were already configured correctly (which I had confirmed as a part of initial troubleshooting).
The phone works fine now, though some features like AT&T HD Voice and the AT&T Call Protect app still don't work. I've tried contacting them twice about it and they opened a ticket but it hasn't helped. These aren't features I used before so I don't really care.
jasonw3 said:
The issue required a visit to the AT&T store, where they replaced the SIM and reset some of the network features on the back end of my account. This required a call to the retail technical support team and about 45 min. No settings were changed on the phone. The APN settings were already configured correctly (which I had confirmed as a part of initial troubleshooting).
The phone works fine now, though some features like AT&T HD Voice and the AT&T Call Protect app still don't work. I've tried contacting them twice about it and they opened a ticket but it hasn't helped. These aren't features I used before so I don't really care.
Click to expand...
Click to collapse
Keep in mind though that HD voice only available to postpaid At&t only not prepaid and they do required special sim card for hd voice but since you already changed sim card then the problem is not the sim card. You can try and dial #*#*4636*#*# and see if Volte is provisioned.. I wish i had my s9+ from tmobile but i dont have it anymore i was waiting for that byod software update.. Hd voice should work on BYOD custimization update on at&t
Hi all,
I recently switched from T Mobile to Mint, but for some reason the phone won't connect to Mint network. The only way I could get it to register with Mint network is if I login to Mint website or use their mobile app to disable wifi calling then re-enable it. This method only works when I'm home, but if I restart the phone or if it loses connection, it just will not connect again until I disable wifi calling and reenable it through their app. But the same trick does not work when I'm at work. I'm not sure what the difference between the towers where I live and those where I work. Basically, when I try to register manually or automatically, I get unable to connect to the network at this time and to try again. Even if the phone isn't registered with Mint network, I can still make and receive calls through Wifi Calling though.
The phone worked fine when I had T Mobile. I also have LG G8X and the same sim works fine with Mint.
My phone is Sprint LG G8 G820UM20f cross flashed with US Open NAO firmware. Again, the phone worked perfectly fine with T Mobile before I switch to Mint.
I prefer using the G8 instead of the G8X as I like the smaller size and better screen. Any suggestions on what I should try here before I try reset the phone to factory settings or flash with another firmware? I already tried deleting cache, reset network, safe mode, using T Mobile APN instead of Mint.
I should also mention that T Mobile sim uses MNC 260 and Mint Mobile 240. I'm wondering if this has something to do with it not being able to connect to certain T Mobile towers, but according to what I read sim using 240 MNC should be able to connect to cell towers using MNC 260.
Thank you
Did a factory reset of the phone through the recovery menu, but unfortunately phone still won't register with Mint network.
Cross flashed from US Open NAO firmware G820QM20f_00_NAO_US_OP_0402 to USC (US Cellular) firmware G820UM20j_00_USC_US_OP_0607 but same thing... still refuses to register with Mint network. There is also no Wifi calling option in Settings menu with USC firmware and the hidden menu also shows it's not provisioned for wifi calling.
I'm going to flash it with G820UM20j_00_OPEN_CA_OP_0120 next and see if I have any luck.
So sad Still no luck with Canada firmware. CA firmware is even more minimal than US Cellular... no VoLTE or Wifi calling. Also no matter what firmwares, T Mobile APN always show up under APN. Which partition have this info saved under?
I'm wondering if I should try flashing it with Verizon Android 11?
I cross flashed with T Mobile G820TM20j_00_TMO_US_OP_0216.kdz firmware, but no luck still. The phone with this firmware should work great if you have T Mobile as you can see from the attached pictures, all three options... Wifi calling, VolTE, and Video Calling now show provisioned in hidden menu *#*#4636#*#*. With the US Open NAO firmware, only Wifi Calling and VoLTE would be provisioned.
I might switch back TMobile again after my 6 months plan with Mint ended just to avoid this headache.
Note: I followed this guide written by @netmsm here:
[Tutorial] Crossflash, Bypass OPID Mismatched Error
Hi there ;) Thanks to all other guys here who have made helpful development to tame this beautiful =) To crossflash models other than LG G8 please read post 3. Before asking any question please read the troubleshooting section at the bottom of...
forum.xda-developers.com
I use mint and my apn settings are for 310 / 260. My G8 is xflashed to us open also. Works perfect. Sounds like u might have messed up apn settings.
AsItLies said:
I use mint and my apn settings are for 310 / 260. My G8 is xflashed to us open also. Works perfect. Sounds like u might have messed up apn settings.
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Click to collapse
Thank you for confirming that it works with Mint. I contacted their online tech support twice and they basically said my G8 is not compatible with their system based on my IMEI number. Their compatibility checks also said the same thing for my G8X, though it works perfectly fine with their network.
Anyway, your confirmation gave me an idea to try another sim they sent me for the 12 months plan. I originally purchased the 12 months plan but canceled it and purchased their 3 months + 3 months free plan. Even though I canceled the 12 months plan, they still sent me the sim kit.
The sim that comes with the 12 months plan happened to be using 260 MNC so I put it in, and it registered with their network instantly. I'll try and see if I can transfer the plan over to this sim.
Not sure why the G8 has problem using sim with 240 MNC, but not the G8X.
Unfortunately, the 260 MNC sim can't be used as replacement sim to transfer the plan over, so they sent me a new one.
The new replacement sim also uses 240 MNC, but what is weird is that before activating the new sim, my LG G8 had no problem registering with Mint network and it connected as 4G LTE. I rebooted the phone multiple times just to make sure it works consistently and wasn't just a fluke. But as soon as I went through the process of activating the sim to transfer the number over, it wouldn't register with the network again and only allows emergency call just like the old sim. Of course, the new sim works fine in the G8X.
I'm not sure what to makes of this now. I'm wondering if sim using MNC 260 would have the same problem once activated. At this point I guess I just have to use my G8X and once the 6 months ended, I'll probably switch to T Mobile $15 plan even though you only get 2.5GB of data compared to 4GB for Mint.