A. Error 53
its could be some reasons for that:
1. It may be software problem ==> just simply restore it with ORIGINAL HOME FLEX(TOUCH ID), without Simcard inserted and try with different mode (DFU, recovery)
2. The HOME FLEX (TOUCH ID) is not ORIGINAL ==> no solution
3. The BASEBAND IC was damaged or was replaced ==> you have to replace full unit in ONE SET of " BASEBAND IC + EMMC + CPU A8 + HOME FLEX (TOUCH ID)"
4. It has some problem with the PCB ==> just DOWNLOAD the picture then try to do step by step. ( thanks to the person who has found this solution for us to follow )
B. about errors 9/14/21/40/4013/4014
I have done a lot of iphones 6/6+ getting such errors with the phone keep restarting at red screen . it is the "EMMC" problem, to fix solve it you need to remove the EMMC and recovery it with a special device. this device cost about 2000 USD and i cannot public the name here, if you guys interest about that you can send me private message then i will help you to purchase ( notice: I am not using the post to advert the device here for sell, just the solution you must know and i have done when facing at same problem )
finally, thanks for reading all of this, hope you guys will share with me your opinions to complete about those errors!
Last edited by chuvanthuongvn; 04-10-2015 at 18:43.