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im a big fan of your work, the video you made about nande uppgrade for 6+ i loved it.
im working with microsoldering for 7 years now, recently i tried to uppgrade an iphone 6 from 16GB TO 64GB, i have done every thing like it should. no scratch on both the board or the chip. tesed both chips they are still working, i read the 16 gb with NAVIPLUS PRO 3000, FIRST I FORMATED THE 64 CHIP, READ THE 16, then i wrote it on the 64gb chip, still the phone not detected by itunes, i have done it thrice to make sure the soldering process is correct, still cant detect the phoneon itunes to be able to restore it. i dont know what im doing wrong. i noticed that the phone gets warm. since you have done the uppgrade successfully. i would apreciate any tips from the community. i feel a bit dispointed after removing both chips successfully, still cant uppgrade the phone. could it be the 32 bit or the 64bit question? is it the nande problem even that it is tested well and working ? is it something wrong with the programming procedures, i formated the new chip. read the old one. wrote it, then clicked set write. what could be the problem please
i apreciate any help. any tips.
It's hard to say what your problem is. A few things that you can try...1) take the nand off and see if itunes recognizes it. If it does, then do a factory restore and see if you get error code 40. If so, then you have a nand problem. 2) Power the phone up and measure the and voltages, more specifically pp1v8_nand and pp3v0_nand. You can also diode mode both of those power lines and compare with a known good board.
I would start with those two things. Since the pads are under the nand, it's hard to say if the nand is the actual problem or not, since you cannot tests the pads under a chip.
now i made some progress but not the whole way though. i changed the nande. programmed it and put it back. the thing is that before i was getting no reading on the power supply. now i get some reading on the power supply , the consumption goes up to 0.900 you know. how it react when the phone starts , it shows that the consumption is going up. and it gets less warm on the processor area. but the phone is not shoreted. so i was doubting the chip brand. i had a skynix and switched to toshiba. is that fine ? so even that i get some reading on the powersupply i still cant detect with itunes to restore it.