Develop Bugs

Get internet sharing and MMS working on unlocked Rogers (and AT&T?)

I finally got my internet sharing and MMS working on my unlocked Rogers Lumia 900 running on Bell. Earlier this week, I came across this page. http://forums.wpcentral.com/lumia-900/197920.htm. If you follow his instructions (minus the unplugging the cable during the rom flashing), you should have working internet sharing and MMS without having to input any APN settings. The first time I started it with the TelCel rom, I still had to input my APN to get data to work. Then I performed a hard reset by holding volume down, power, and camera buttons. After that, it picked up the correct settings from the sim card and everything works as it's supposed to. The only downside to some people is that now instead of showing "LTE" in the status bar, it shows "4G" and instead of "4G" when you are on the HSPA network, it shows an "H". I think this is a truer representation of the network you are on anyways since HSPA isn't a true 4G network like the American companies would have us believe.
Please note that if you are going to do this, you will lose any unsynced data on your phone and will also have to reinstall all your apps so backup what you need to.

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Seems interesting. I will wait for the 7.8 version to come out. I wouldn't want my phone to be stuck at 7.5 for some reason after trying this.

pmcelreavy said:
Seems interesting. I will wait for the 7.8 version to come out. I wouldn't want my phone to be stuck at 7.5 for some reason after trying this.
Click to expand...
Click to collapse
If for some reason it doesn't update to 7.8, you could always just flash the stock Rogers rom back to your phone and then get 7.8.

Sent from my RM-820_nam_att_100 using Board Express

Have no problem with 4G, sharing and MMS on original AT&T firmware (using my lum with Europe operators).

Could it be a SIM card flag that prevents the sharing, the euro ops SIMS dont have it
Could it be a SIM card flag that prevents the sharing, the euro ops SIMS dont have it but the NA ops do?
valuxin said:
Have no problem with 4G, sharing and MMS on original AT&T firmware (using my lum with Europe operators).
Click to expand...
Click to collapse

sa-10 said:
Could it be a SIM card flag that prevents the sharing, the euro ops SIMS dont have it but the NA ops do?
Click to expand...
Click to collapse
May be, may be... But I had problem too with this features, when it worked on a 1st firmware (flashed by AT&T, not by me). Then I decided to flash it on my own via Care Suite (had flashed the earliest firmware, then updated via Zune). Now it works without any problems. After flashing try to not use the Nokia's Network Setup. If sharing would be OK, you could install NNS on your choice

It works for me after doing a hard reset with t) mobile, if I run NetworkSetup then it stops working. If I insert my att sim then it also stops working.
Sent from my RM-820_nam_att_100 using Board Express

One more datapoint...
Recently unlocked, using Taiwan Cellular unable to tether.
Before installing Network Setup receive message: no data connection found...
After installing Network Setup, "to enable tethering on this device, go to att.com...".
Same SIM card in HD7 allows internet sharing... no problem. So it's not the SIM.
On HD7, data connection shows "H" but on Lum900 showing "4G"... (not a problem, just observation)
Have hard reset with Taiwan SIM, no joy. Reflashed using Nokia Care Suite... same results.
1. It's clear, stay away from Network Settings app. Even overriding APN settings results in same bogus ATT message.
Any point in flashing a pre-8779 rom? One of the TelCel MX or Claro LTE roms?
To flash another RM808 carrier's rom on top of an ATT RM808 device, is it a straight flash with NCS or need to rename files?

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no radio - no GSM service. bootloader unlocked

1.) PHONE ORIGINALLY LOCKED TO SPRINT
so i bougt this phone second hand in Europe. The phone had a bad screen and possibly some other damage i don't know about. Anyway, it turned out that the phone was locked to Sprint and i could not use it with my sim-card.
2.) PAID A GUY ON EBAY
https://www.ebay.com/itm/SPRINT-SIM...M-G710PM-CONVERT-TO-UNLOCKED-G7-/302468495217
I paid that guy (i do believe that he is also a member of the XDA community) and he ensured me that the phone was now unlocked and that i could use it with my sim-card. Under settings - hardware info it said model number was G710VM (or VMP or VMW, i don't remember exactly, but it was verizon wireless). the problem was that my phone still could not connect to the network. also, hidden menu *#*#4636#*#* was not accessible. Moreover, wi-fi connectivity was... mixed bag. Sometimes it worked, sometimes it did not work.
(in case the link is dead - he used octoplus to do the thing he did)
(he probably participated in this discussion: https://forum.xda-developers.com/lg-g7-thinq/help/lg-g7-sprint-unlock-t3823449)
3.) UPDATE TO PIE
https://www.****************/2019/06/17/download-and-install-lg-g7-android-9-pie-via-kdz-firmware/
After following these steps to get the Pie update (which i hoped would be the solution to my problems). Phone now reported it was G710ULM. Also, on lock screen in the top left corner it said 'No service - Mobitel'. Mobitel is the service provider here, so i was kinda hopeful, since it seemed that the phone can detect the network, but cannot connect. Hidden menu *#*#4636#*#* was accesible, but it only helped with my wi-fi connection. The 'select radio band' always reports 'selection unsuccessful'. I still could not set network manually or automatically for that matter (always error when i tried). I also tried the 10f firmware (oreo) and some others, but no luck. after i unlocked the bootloader i also performed the 'erase modemst1 modemst2' commands before flashing a new firmware but that also did not help.
(in case the link is dead - basically flashing firmware via LGUP)
4.) UNLOCKING THE BOOTLOADER
https://forum.xda-developers.com/lg-g7-thinq/how-to/how-to-bootloader-unlock-g7-thinq-t-t3963568
So this is where it is at at the moment. I followed this steps and now it reports product name LM-V350ULM and 'device state - unlocked' in the bootloader. If i boot it into recovery mode i just get the dead android with the red warning sign and 'no command' written under it. The device could access internet via wi-fi... until i put in the simcard. Now it cannot see the network anymore. If i repeat the command 'fastboot boot 710ULM11g_rootedboot.img' i get wifi back.
5.) THE POINT BEING?
Yeah. the point of this thread is obviously - what can i do to get the network?
This is my first android phone and yeah, quite the introduction to the android world that is.
Obviously i can (hardly, but i can) follow these step-by-step instructions, but apart from that, i have no idea what to do or how to do it. So yeah, this phone is pretty much just a wifi machine unless someone can help me.

I did unlocked my bootloader following this tutorial
https://forum.xda-developers.com/lg-g7-thinq/how-to/how-to-bootloader-unlock-g7-thinq-t-t3963568

Why is your device showing V350ULM (that is U.S. Unlocked V35 Thinq)? Reflash G7 pie firmware from Europe and access #*#*4636*#*# and change the network to GSM/WCDMA/LTE and check if it picks up the network.

sinkoo1979 said:
Why is your device showing V350ULM (that is U.S. Unlocked V35 Thinq)? Reflash G7 pie firmware from Europe and access #*#*4636*#*# and change the network to GSM/WCDMA/LTE and check if it picks up the network.
Click to expand...
Click to collapse
it's showing V350ULM because i unlocked the bootloader via the method described here: https://forum.xda-developers.com/lg-g7-thinq/how-to/how-to-bootloader-unlock-g7-thinq-t-t3963568
there is no other known method to unlock the bootloader on any LG G7 thinq except for the european version.
If i reflash the G7 pie firmware my bootloader gets locked again. I know because i already did that. While I had that firmware i also dialed *#*#4636#*#*, but when i change the network nothing really happens. If i choose the 'select radio band' sub-menu i always get the 'unsuccessful' message no matter which band i choose.

tws_ifp said:
it's showing V350ULM because i unlocked the bootloader via the method described here: https://forum.xda-developers.com/lg-g7-thinq/how-to/how-to-bootloader-unlock-g7-thinq-t-t3963568
there is no other known method to unlock the bootloader on any LG G7 thinq except for the european version.
If i reflash the G7 pie firmware my bootloader gets locked again. I know because i already did that. While I had that firmware i also dialed *#*#4636#*#*, but when i change the network nothing really happens. If i choose the 'select radio band' sub-menu i always get the 'unsuccessful' message no matter which band i choose.
Click to expand...
Click to collapse
I unlocked my bootloader using the same method and it will not lock bootloader if you flash pie firmware (once it's unlocked it's unlocked). And my G7 is showing as G710ULM not V350ULM (using the same method to cross flash firmwares). Make sure to flash European pie firmware.

Question Volte suddenly stopped working

Hello, Volte used to work well on my op9 pro recently updated to A12, I tied switching my sim card from sim 1 to sim 2 as I read some users were able to connect to 5g that way, well, it didn't work and when I switched my sim back, volte stopped working, tried restarting the phone a couple of times, no luck. Any ideas ?
Also, even before switching to A11 5g never worked and still doesn't work on my 9Pro in the UAE, tried all possible solutions and it still doesn't work, any possible solutions?

Can you try to reset your APNs and/or the whole networking? (Beware: by resetting the network you'll loose your saved WiFi configurations.)

MaUop3 said:
Can you try to reset your APNs and/or the whole networking? (Beware: by resetting the network you'll loose your saved WiFi configurations.)
Click to expand...
Click to collapse
I just tried that, didn't work unfortunately, no volte or 5g, I only get 4g+ and my sim supports 5g on other devices :/ I can live with 4g, but I need volte to work

Mardds said:
I just tried that, didn't work unfortunately, no volte or 5g, I only get 4g+ and my sim supports 5g on other devices :/ I can live with 4g, but I need volte to work
Click to expand...
Click to collapse
I was getting the same issue, but flashing a different variant of your current c.44 should do the trick.
Ex: I have a LE2127 (TMO), I converted with a11 to use LE2123(EU) software updates. When android 12 hit my phone wouldn't give me data on the 2123 update, so I had to download the LE2125(global/NA) update and flash using the the system update app that was so generously given in the following post:
Post in thread '[TMO] 9 PRO MODEM RETENTION' https://forum.xda-developers.com/t/tmo-9-pro-modem-retention.4292445/post-86328243
I don't know what software or model your phone is now, so I am NOT suggesting you switch if you are not already on 2123 or 2125. Those two are interchangeable without problem so it should be fine

Trying to change firmware--CCT_US to OPEN US

The question is what is CCT_US so I can get the correct version for this phone? Or the best way to flash to OPEN_US. I have G820QM30c_00_NAO_US_OP_0103.kdz downloaded & the phone is a G820QM with 30c already installed. Trying to get WiFi calling enabled.

OK--I've found more info...The phone is a LMG820QM5 from Xfinity Mobile. LG-Firmwares only lists 30b as the latest version--the phone has 30c....so it looks like cross-flashing it would be the ?best? option?

debianmain1 said:
OK--I've found more info...The phone is a LMG820QM5 from Xfinity Mobile. LG-Firmwares only lists 30b as the latest version--the phone has 30c....so it looks like cross-flashing it would be the ?best? option?
Click to expand...
Click to collapse
What carrier are you using / plan to use? The device is unlocked from xfinity?
If you use a carrier like Mint mobile, which I have, yes, wifi calling can be enabled (you would do that on your mint mobile account), with the us Open kdz. The problem is that getting things like vowifi and volte to work, it's a combination of both the carrier and the rom, not just one or the other.
cheers

Device is unlocked--bought it from eBay. Going to use it on the ATT network (Consumer Cellular) The phone has been enabled through CC--I just didn't see the option in settings, so I started to check on what the phone was setup with. Took some tracking to get to the Xfinity mobile conclusion--it threw me a bit that LGfirmware does not list the version that the phone has. Have D/Ld the firmware & plan to start the crossflash today.

Thank You--I used your tutorial & got the firmware changed. I'm out in a rural area & need to goto town to get the phone finished....SO, I'll find out in the next couple of days if this worked...the phone boots & acts normally.

Question T-Mobile Oneplus 9 Pro: unblocking for EU SIM?

Hello Enthusiasts!
Is there a way to make T-Mobile OnePlus 9Pro (LE2127) work with an EU SIM?
I'm in Ukraine, and I already have T-Mobile Oneplus 7T Pro (McLaren), which started working with my SIM without effort. So that was a surprise when my new Oneplus 9 Pro, which I bought on eBay, rejected connecting to my local cellular network.
Is this problem solvable at all?
The phone is SIM unlocked, now I've also unlocked its bootloader via the official OP website. Perhaps, if I flash a Global EU ROM (https://forum.xda-developers.com/t/...7-to-eu-via-msm-no-unlock-bin-needed.4272837/), will the phone start seeing my local cellular network? I'm confused by several feedbacks in this thread from guys who have easily bricked their phones by trying to flash this Global EU ROM, so maybe there is no reason to take this risk if it will not solve the problem.
Kind Regards,
Vlad

I don't know of any issues doing MSM to EU firmware.
I've done it dozens of times on my T-Mobile phone that I use on a T-Mobile plan.
I can (and have) go back and forth between EU and T-Mobile MSM all day without any issues.
But please stay the **** away from the India MSM.
I think that's labeled "IU" or "IA" or something with an "I" in the name.
It supposedly will cause unresolvable issues trying to go back to T-Mobile firmware.

Validator1982 said:
Hello Enthusiasts!
Is there a way to make T-Mobile OnePlus 9Pro (LE2127) work with an EU SIM?
I'm in Ukraine, and I already have T-Mobile Oneplus 7T Pro (McLaren), which started working with my SIM without effort. So that was a surprise when my new Oneplus 9 Pro, which I bought on eBay, rejected connecting to my local cellular network.
Is this problem solvable at all?
The phone is SIM unlocked, now I've also unlocked its bootloader via the official OP website. Perhaps, if I flash a Global EU ROM (https://forum.xda-developers.com/t/...7-to-eu-via-msm-no-unlock-bin-needed.4272837/), will the phone start seeing my local cellular network? I'm confused by several feedbacks in this thread from guys who have easily bricked their phones by trying to flash this Global EU ROM, so maybe there is no reason to take this risk if it will not solve the problem.
Kind Regards,
Vlad
Click to expand...
Click to collapse
If it's sim unlocked, it should not be rejecting connection to your cellular network. Unless the frequency bands used in your area are missing from the modem. That also seems unlikely because the 9P has one of the widest coverages for bands of any OP phone. Maybe try selecting 4g/3g/2g default instead of 5g/4g/3g/2g.
(Settings->Wifi & Network->Sim & Network->Preferred Network Type)
Are you certain it's sim unlocked?
I am also on a tmobile 9P and used the msm->eu with no problem. I've done it a few times without problem going either way. But I don't know if that would solve your issue. Don't forget to back up your modem, persist, and modemst1/2 partitions before flashing the EU rom just in case. It won't hurt anything to flash the EU rom - you will be able to recover if anything goes wrong. And you'll get rid of the ugly ass tmobile branding. But you won't have the SIM unlock built in anymore so be certain your phone is currently PERMANENTLY Sim unlocked or you'll need to flash back to MSM->Tmo to use the built in unlocking app. If you are sure it's already permanently unlocked, give it a go Vlad

Thank you @CZ Eddie , @Appreciative for your answers.
I've validated here that there is definitely not a hardware problem with wireless bands support.
So now I understand that moving to Global ROM will not resolve the issue with "No carrier network". Googling the issue provided two more options:
1) try to switch the radio bands region via the menu in *#*#4636#*#* (the guy here described totally the same issue as I have). That didn't work for me, saying that it cannot switch the region to Europe (as well as to any other option);
2) try to erase modemst1, modemst2, as per the solution described in this video and also in this xda thread, but I'm again at risk of bricking the phone. At least, that was stated in the mentioned previously thread: *** Backup your working modemst1/2 and persist. If you lose these for any reason, it's unique to your device and not recoverable if you didn't back up (via MSM or other people).
Commands:
Take out sim
Bash:
adb reboot bootloader
fastboot erase modemst1
fastboot erase modemst2
fastboot erase cache
fastboot reboot
Insert sim
Am I right to understand, that I can use MSM to backup modemst1/2, then I could safely recover them back from the backup if my try with the second option doesn't help?

Validator1982 said:
Am I right to understand, that I can use MSM to backup modemst1/2, then I could safely recover them back from the backup if my try with the second option doesn't help?
Click to expand...
Click to collapse
That's supposed to be the case. MSM->F8, select is how I backed mine up.
I have read that if modemst1/2 is erased, it's restored/repaired/rebuilt from efs (or fsg) if available.
I've also read that when trying to restore modemst1/2 that it'll say fail to flash critical partitions and the suggested fix is to fastboot reboot fastboot while in fastboot. I haven't personally tried to restore my modemst1/2

Thank you @Appreciative !
I've hardly managed to put my OP9P to EDL mode and connect to MSM - after plugging in the phone with pressed +-, it was always trying to boot into OS immediately or soon after MSM told me it was connected.
Anyways, during those seconds while my phone was successfully connected to MSM I pressed F8, chose modemst1/2 options, and clicked on the 'Ok', but it asked me to provide a password. Is there any default password for MSM to do the backup, or do I need to ask TMO or OnePlus for it?

Validator1982 said:
Thank you @Appreciative !
I've hardly managed to put my OP9P to EDL mode and connect to MSM - after plugging in the phone with pressed +-, it was always trying to boot into OS immediately or soon after MSM told me it was connected.
Anyways, during those seconds while my phone was successfully connected to MSM I pressed F8, chose modemst1/2 options, and clicked on the 'Ok', but it asked me to provide a password. Is there any default password for MSM to do the backup, or do I need to ask TMO or OnePlus for it?
Click to expand...
Click to collapse
The password is oneplus and the files will be saved to C:/

I've managed to do the necessary backups via MSM, and then tried the following:
1) switched with MSM from TMO Android 12 to TMO Android 11 OS (11.2.6.6);
2) switched with MSM from TMO 11.2.6.6 to EU 11.2.2.2 (from the thread regarding the switching from TMO to EU) - here I'm still able to see and trigger "OEM unlock" in "Developer Options", successfully executed "fastboot OEM unlock";
3) applied OTA upgrade from EU 11.2.2.2 to EU 11.2.10.10 - here I see greyed "OEM unlock" in "Developer Options", but still able to successfully execute "fastboot OEM unlock";
4) applied OTA upgrade from EU 11.2.10.10 to Android 12 - here I already see LE2123 in "About phone", instead of LE2127 as before; I still see greyed "OEM unlock" in "Developer Options";
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Everywhere there I still wasn't able to make my SIM card to be connected to the cellular network even though SIM card itself was successfully detected.
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5) rolled back it all by switching back to TMO 11.2.6.6 via MSM. I got my bootloader locked and I still see greyed "OEM unlock" in "Developer Options". I've unlocked the bootloader via fastboot and my key file, but still wondering how to get ungreyed "OEM unlock" in "Developer Options". The Network Unlock status is "Permanent unlock".
6) I've tried to fastboot erase modemst1, but it told me that critical partitions were locked, so I cannot do that. I've also not found how to unlock that.
And my SIM is still unrecognized. So I got stuck.
Do you have any ideas?

Validator1982 said:
I've managed to do the necessary backups via MSM, and then tried the following:
1) switched with MSM from TMO Android 12 to TMO Android 11 OS (11.2.6.6);
2) switched with MSM from TMO 11.2.6.6 to EU 11.2.2.2 (from the thread regarding the switching from TMO to EU) - here I'm still able to see and trigger "OEM unlock" in "Developer Options", successfully executed "fastboot OEM unlock";
3) applied OTA upgrade from EU 11.2.2.2 to EU 11.2.10.10 - here I see greyed "OEM unlock" in "Developer Options", but still able to successfully execute "fastboot OEM unlock";
4) applied OTA upgrade from EU 11.2.10.10 to Android 12 - here I already see LE2123 in "About phone", instead of LE2127 as before; I still see greyed "OEM unlock" in "Developer Options";
----
Everywhere there I still wasn't able to make my SIM card to be connected to the cellular network even though SIM card itself was successfully detected.
----
5) rolled back it all by switching back to TMO 11.2.6.6 via MSM. I got my bootloader locked and I still see greyed "OEM unlock" in "Developer Options". I've unlocked the bootloader via fastboot and my key file, but still wondering how to get ungreyed "OEM unlock" in "Developer Options". The Network Unlock status is "Permanent unlock".
6) I've tried to fastboot erase modemst1, but it told me that critical partitions were locked, so I cannot do that. I've also not found how to unlock that.
And my SIM is still unrecognized. So I got stuck.
Do you have any ideas?
Click to expand...
Click to collapse
I can help you with getting the oem unlock toggle, using @Ju5t3nC4s3's tool here: https://forum.xda-developers.com/t/...ader-unlock-enabler-engineer-decrypt.4380419/
Although that doesn't solve your problem at all. There is a chance the tmobile variant (or any version I suppose) does not support the network in question at all. It could be missing the bands in the modem or maybe blacklisted on the network? I've read ATT blocks some OP devices from the network. Is it possible the device has a blacklisted imei? What carrier is the sim?