This phone came with custom rom (bootlooped), and the only way we could resurect it was to flash it without some img (I flashed with G925FXXU2BOFJ, but I removed: Hidden, CM and SBOOT)
If i flashed with full tar, I always got error, thats why I removed those img and flashed.
Phone came UP OK, but IMEI NULL.
I tried everything to repair IMEI (Write EFS) - ok
Write EFS - Initialization AT RIL... error
Any ideas what else to do to get it working ?