First - the ROM is very very fast!!
Few issues I experienced ( copying form 1+1 official forum)
The exit point
// My OPO was purchased in Austria 2 years ago. First year all was good, then ppl started to complain that phone is not reachable sometimes.
I noticed that no reception and no data services were for few minutes after boom ! it's coming back again. Phone located on same place - on the table.
Sine we have another OPO at home and it's working pretty good on LTE ( Band 3, 1800), I flashed same OS and same baseband, but on second phone the kernel kernel and increment is higher ( OOB settings)
Still the phone is going to H+ in best.
There are few issues i see here:
1. SIM card and APN settings, I'm usinbg virtual provider services and once I switch to it's "mother" 3G APN settings I get pretty stable H+ signal and sometimes LTE.
Cross-Cross SIM. Mine SIM works bad in second phone. the second phone SIM gives H+ on mine
So, first of all the SIM will be replaced.
Again, I wanted to get LTE services on second DIM in my phone, but it doesn't. This phone will go to kid kid in a week, I'm trying to get stable services ( data/voice) on it.
So:
I have now: Kitkat 4.4.4
cm-11.0-XNPH33R-bacon-signed-fastboot - flashed by fastboot
Unlocked bootloader
Rooted + TWRP recovery
Baseband : MPSS.DI.2.0.1.c7-00020-M8974AAAAANPZM-1//
The stuff were done.
Flashed Sultan ROM using TWRP exactly as described in Installation Instructions.
NOT ! flashed Frankenshtein modem
Currently I have the following:
First of all I switched to another carrier, which coverage is much better in my area
I finally burned CM 12.1 Sultan ROM.
Currently running on the following:
CM version: 12.1-YOG7D-20160410-Stable-Sultan-bacon
Android version: 5.1.1
Baseband: DI.3.0.c6-00241 ( the one from ROM)
I have H+ pretty stable signal at work place ( not tested at home yet). no LTE although.
Tried to switch to AUS band in 4636 menu and still no LTE
Once I try to check the avialable network ( Settings - Mobile networks), I have no output networks in this menu, although calls are working fine.
Is it a way I still can get a LTE on phone? Somebody recommended MM official ROM. I'm really illustrated with this phone...
Thanks
Link to 1+1 thread