1- I do hate Sony firmwares of Android 4.3 and the new 4.4 firmware because I want to stay LB and I do need to root and mount SYSTEM partition
which are difficult on such firmwares and I simply don't like deodexed flashable roms dear devs here provide.In my opinion Android 4.2.2 FW 14.1.G.2.257 seems to be the best one for me...but how to get this one rooted and stay odexed on LB? here are the steps I took :
2- I was on 4.3 and when i went to 14.1.G.534 my phone lost IMEI and GSM SIGNAL and couldn't OTA to 14.1.G.2.257(much to my surprise the phone downloaded the OTA update but the installation failed, so I flashed 14.1.G.2.257 and then went all the way back to the first firmware of z1 which is rootable: 14.1.G.534
3- I rooted this firmware with Kingo root , updated superSU Pro to the latest version enabled survival mode in its settings and installed recovery but now the OTA updater on the phone detects Android 4.3 FW 14.2.A.0.290 and I have no clue how to make it OTA to 14.1.G.2.257 NOT 14.2.A.0.290. As of now, I am stopped here and wondering if a small flashable zip with my desired OTA update could be provided to solve my problem or any other idea how to have my phone in the desired state...
Your help is highly appreciated