I Seen't it, so i read the unofficial All Things Root by ARocker (Nice, btw) and I read that if you have 4.3 you cannot downgrade to 4.2 or anything older and that the "MK5 bootloader locks things down a bit" with the main thing being your warranty is GONE after rooting when on 4.3... My phone was shipped to me from Asurion with 4.3 on it I guess my question is... Does this mean that i cannot install any custom ROMs that are not based off of 4.3 or I just cant ODIN back to a stock 4.2? Basically this is what i want to do to my phone so far... Flash KT Kernel: [KERNEL][TMO][AOSP/TW/GE - 4.4/4.3/4.2][03/27/2014] KT-SGS4 - MJ5 - KTweaker - xda-developers Flash Insane Kit Kat 4.3 Touchwiz: [ROM] Insane Kit Kat [TW- NB4] UPDATE [NEW REBUILD] 3/24/2014 - xda-developers and... I've not decided if i should change the modem on my phone. If i'm not mistaken the modem i'm using is the MK5? I found it at the end of Build&Baseband and when i googled it only modems came up so i'm guessing i'm correct but i do not want to assume anything with a $600 phone. What factors do you take in to consideration when making a decision to flash a different modem? Your physical location? Modem Reviews?? Is the above safe to do? Other than not flashing to a stock 4.2 (or older) via ODIN is there anything else that i should NOT do or any other ROMs/Modems/Kernels/Firmware that i should stay away from? My Phone: Baseband: M919NUVUEMK5 Build Number: JSS15J.M919NUVUEMK5 IMEI: yea ESN: right THANKS IN ADVANCE!