Hi I'm looking desperately for help with these 2 major isssues, any advice will be much appreciated. I recently bought this phone SM-N9005 and worked perfectly until I realized my gps doesn't work properly. After a brief research I discovered a youtube guide with positive responses so I gave it a shot. =hC8jNb38gaY . This included ServideMod digging via *#9090# -> insert Q -> insert 0000 -> UE settings -> setting -> system -> NV rebuild -> ALL . After that my sim card was no more functional just as any other I then tried. So this is my first major problem: 1) INVALID SIM CARD The sim card was doing just fine before that and is still doing when put into other devices, but no matter which sim card I try the problem still persists. So I tried factory resets, loading different firmwares... which led to problem: 2) CAN'T LOAD DIFFERENT FIRMWARE I think I was doing all accordingly to guides but still can't force my phone with different firmware. I got it rooted, and everytime I try to use Odin it just gets stuck at "Complete write" fail or FAIL Auth. The only firmware I could load into it was the early leak of loli 5.0 N9005XXUGBNL8 . I then tried several of them so I could use for example AryaMod (which gets always stuck shortly after start of the installation - i think because i cant load demanded firmware) but to no avail. The so far tried firmwares were the stock ones; N9005XXUGBOJ6_N9005XEOGBOJ1_N9005XXUGBOJ1_HOME.tar N9005ZSUGOH3_N9005OZSGOH3_N9005ZSUGOH3_HOME.tar N9005XXUGBOI6_N9005ETLGBOA2_N9005XXUGBOH1_HOME.tar N9005XXUGBOI6_N9005O2CGBOF2_N9005XXUGBOH1_HOME.tar And the only working is the one mentioned above from early loli 5.0 leak : BL_N9005XXUGBNL8_CL3643614_QB3415922_REV00_user_lo w_ship_MULTI_CERT.tar, which I currently have. Any other attempt to load meets with the same failure. I tried different versions of Odin, starting them as admin, different usb ports, wiping before, rooting it but just can't load any other. : / So finally I'd like to ask: Is there any way to revert damages I did by doing that ServiceMod thingy? To get rid of that INVALID SIM CARD notice? I'd like to do it myself if possible. And secondly, why can't I get any other firmware working? Is it wrong choice of firmware not compatibile with my phone or I just overlooked something during installation? If you reached it all the way here, thank you. Please share any advices you might have. Additional info: from *#1234# if its of any help : AP: N9005XXUGBNL8 CP: N900PVPUEOC5, also the imei number checks out and the strange thing is the model number in download mode is N900P which differs from N9005 written on case, system etc..