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swapping board keep data course1.iPhone 6 to 11promax every model theory Swap board detail tips2.How to Swap board-Hand skills Practically3.How to use JC NAND Programmer to unlock WiFi4.How to use JC EEPROM Programmer to read and rewrite the data of EEPROM5.How to Swap the upper board to fix all problem of upper board6.How to Swap the lower board to fix all problem of lower board7.How to handle the A11 CPU,Baseband and other chips for keep data swap board8.Master the highest technology of mobile phone repair-guarantee data swap board