[Sprint LG G4] br0adband:
Well dag nabbit, I hate asking for help with things but I'm not getting this working with my recently acquired LS991 which was unlocked (by this method according to the previous owner), worked with my T-Mobile service with good LTE support (previous owned had used it for the same plan I have with T-Mobile). Originally when I got it a few days ago it was running UltraPOP AOSPish v1.0 ZVA but I wasn't impressed with it - don't like Marshmallow that much anyway. I didn't want to risk getting that ZVB update in any manner so I decided to head back to ZV6 and have root access to do some other stuff but I wasn't done with UltraPOP just yet.

So I used it for a day or two with that UltraPOP ROM, testing LTE speeds as it was working, but knowing at some point I'm going to need root I figured I better just get on with it so here's what I did:

- used LGUP (latest) to flash LS991ZV6_12_ARB02.tot fully, then did factory reset on the first boot, everything works as expected, no issues to speak of at all.

- shut down, flashed the ZV6 rooted system img and did another factory reset after that (didn't need to but whatever)

- set up the phone as expected, again everything is working except the cellular since I don't have a SIM card in it (I do have a Sprint SIM here if needed)

- got stuck at the "Configuring your phone" screen, looked up some bypass info, pressed VolUp+VolDown+Power twice in quick succession, voila, "This phone is not configured... Skip" and moved on

So now I'm on ZV6 rooted (updated SuperSU, no issues), everything is still fine so I decide it's time to get this thing unlocked. Still no SIM card in the device, mind you, but I have my T-Mobile one just waiting to get in there. Grab the tools from the first post of this thread, follow them explicitly, do the unlock process only, everything seems ok, reboot.

Upon the reboot I see mayrer's sig added to the boot animation (probably the shutdown too but hadn't seen that yet) so I figure "Success..." and let the phone finish booting to the desktop.

Shut down at that point, insert my T-Miobile SIM, boot back up and... well, there's a SIM card in there but it ain't doing nothing. I'm not getting any kind of invalid SIM or deactivated SIM messages, nothing. I get the icon on the menu bar of a SIM card signal with the ! exclamation point. Check settings, the SIM card is being recognized but it's something else.

Now before I continue I will say that the APN data for this device when I got it - with a T-Mobile SIM in it from the original owner - showed the fast.metropcs.com APN listed, not T-Mobile, and I wasn't able to add or change it when it was running UltraPOP.

With the way it is right now, it has a T-Mobile SIM in it (unactivated one that lets me connect and run speed tests and even call customer service if needed so yes it works, and it was working in the phone when running UltraPOP as well).

A SIM card is in there and detected but I can't seem to make use of it. The APN data shows nothing and if I attempt to add a new one it won't save any data. So I go back to the OP's tools, choose the add APN (with root) option, put in all the data and it still won't save or stick. Tried other things but nothing is working so either I missed a step someplace or I broke something in terms of compatibility, I honestly don't know.

None of the hidden menu choices or selections stick in any way either so it's a bit frustrating, then again it's part of why the Sprint model is avoided I suppose.

Could use some assistance here presuming that it'll eventually work itself out,. If not then I suppose I'll reinstall the UltraPOP AOSP one for ZVA (not ZVB, avoiding that at all costs.

One last thing: when I do use the hidden menu thing I get the "Access Point Names" screeen (all black) with just ota and otasn listed - no menu button of any kind and tap-holding the item does nothing at all either. Also, it's not showing me the ability to see or scan for other mobile networks at all, guess I might have broken something someplace since I can't even choose a carrier after a scan, geez.

Thanks for any tips or suggestions...