help needed for s6 edge SM-G925i

I Have s6 edge g925i...i m stucked at samsung s6 edge logo...when i enter recovery mode it shows "dm-verity verification failed..need to check DRK first...i tried flashing stock firmware 5.1.1 with odin 3.10.6 and it is successfully getting flashed but still at same condition :( help me people :(

Doesn't work LTE on SM-g925i S6 edge.

I bought a second hand s6 edge gold 64gb, sm-g925i and i didn't have a lte sim card. i changed that sim and now i can't get lte. i live in an area with lte. can anyone help me please? i search the internet for a solution but i didn't find anything. Thanks!