Taiwan Province Xinxing Electronics Co., Ltd. was established in 1990, and its headquarters is located in Guishan Industrial Zone, Taoyuan, Taiwan Province Province. It is a world-class printed circuit board leader and a world-class supplier of PCB and IC carrier industry. Xinxing Electronics is one of the main suppliers of Apple's iphone motherboard (PCB).
UMT motherboard has a low melting point of tin, and the motherboard is fragile, which easily leads to the disconnection of the motherboard, thus causing various problems. IPhone with UMT PCB motherboard has a much higher probability of pad falling off due to external forces such as falling. If you want to see which supplier produced your mobile phone motherboard, you must take it apart.
Umt's motherboard is prone to problems. Sometimes the line resistance is wrong, so don't use it again. If there is resistance, it must lead to a circuit. No matter what voltage is introduced, it will not be normal. Giving it up may be the best choice.