[LG G2 Mini] Kpsr94:
Hello everybody!

I'm owner of Polish D620r (LG G2 Mini) and I decided to install some nice custom ROMs right after my warranty expired. I should actually do this even before because of enormous lags on Lollipop stock. Unfortunately I'm having weird issues with modem.

My story starts with new recovery (TWRP_2.8.7.0_D620.img.zip) downloaded dunno from where (probably XDA). Right after that I installed Cyanogenmod 13 (cm-13.0-20160107-NIGHTLY-g2m (1).zip) downloaded also from a thread on XDA forums. Everything worked fine expect there was no available network operators- no internet connection, no SMS, no calls, nothing (inb4 I had my real IMEI and contacts). Then I read some daub (trash) guides and installed wrong modem for my phone. That was a big mistake cause it generated a bootloop and reinstalling a CM13 didn't solve the problem. Also I'm worried now that my EFS has been corrupted.

I decided to download and install a stock (D620r20a00_flash_TWRP_SU.zip from XDA) and everything started to work again. I had LTE and T-Mobile.pl network. I thought my network problems are gone so I installed CM13 again but unfortunately nope. Since that my IMEI is now "00" and I have connection with operator only with 2G/EDGE/GSM. Every time I was trying to set Preferred network type for "LTE" or "3G" there was no signal (cell coverage) and was occurring notification "Connect problem with service T-Mobile". Thirty seconds later it was automatically changing for EDGE with full signal. Then I've got interested in CM and I realized that LineageOS is continuation of Cyanogenmod.

I downloaded and installed LineageOS 14 for my D620r (lineage-14.1-20170704-nightly-g2m-signed.zip) because OP of XDA thread said that every bug has been repaired. And that's not truth cause I still have the same problem- no IMEI and no LTE/3G internet (no LTE/WCDMA). Also LineageOS created new problem- I can't import contacts from SIM card.

Guys really I've already spent one week for trying to solve this problem and now I'm out of ideas and I need your help. I was trying to use any options for APNs, was creating new ones, was deleting all of them and leaving just one. I took modem.bin from lollipop stock and replaced it in .zip with modem for LG G2- didn't solve the problem. Then I tried to install these modems for LG G2- system wasn't booting so I installed back again that .zip with replaced modem for LG G2 mini and system is booting now but it's still EDGE. I entered /dev/block/platform/by-name/ and backup modem, modemst1 and modemst2 and then delete it or replace with others but still didn't make any change.

Most weird is that sometimes I have LTE or HSDPA+ for about 30 minutes. last day I had a record with 15 hours of LTE signal and then rebooted phone and again EDGE only.

Recently I put my SIM card to my girlfriend's ASUS and LTE was fully working.

What's also noticeable is that when I enter to Network operators and after refresh I click on "T-Mobile.pl" then I got message "registered to network" but few seconds later I have "No service" notification and sometimes (but not always) it finds service but still EDGE. But when I choose "Choose automatically" it finds services immediately and also still with EDGE.

I will add some photos soon.

For everybody who tldr- I've installed: stock Lollipop-->CM13-->LineageOS 14 and I don't have IMEI, LTE, HSDPA (only EDGE) and can't import or export contacts from/to SIM card.

Ps. I have the same LG model in my home in which wasn't installed any custom ROM and there is still stock.