Ответ на "Galaxy S8 - No cellular signal"I bought a used S8 and noticed signal was extremely $@$*!&, no 4g most of time, I opened and realized the mainboard and charging board didn't match, main was 950U and the charging board was 950F. I guess the guy broke the screen at some point and swapped his old board U but to an F screen/frame/charging board. I replaced the charging board for a 950F so it matched main board and the problem is fixed. Btw je really careful with the broad connector between mainboard and charging board. The first replacement charging board F I screwed up bc i was trying to connect them kinda “blindly" and ended breaking connector, whereas the speaker would only work when I pushed the connection manually, had to buy a second charging board F and this time carefully connecting with mainboard gently and before puting the whole thing inside phone, so I could seeand handle the connectors correctly and not blinded
Ответ на "Galaxy S8 - No cellular signal"Guys, lemme tell u a bit my case, I bought a used G950F (Global single SIM version) here in Colombia, noticed it hardly grabbed any network, almost never showed 4G and even if it did show on top, or H or 3G, data was miserable, pretty much didn’t work, would BARELY send a message, like 5 mins after you “sent” it, ofc wouldn’t load a full website/video/etc. I disassembled and noticed that, you know this phone has two boards, the main and the bottom/charging board (also controls speaker, lower mic and I guess something related to signal) anyway, in the flex cable I noticed it said G950U (USA Unlocked version), so in short, I guess probably the charging port died or smth and they put a 950U charging board with a 950F mainboard, seems they’re not compatible. Found a 950F charging board, my signal is KINDA back, like, it WORKS at least, sometimes, like ofc in open street 4G is fine, youtube etc, but it still drops from 4G to H or 3G all the time, altough it WORKS in those networks now (before it showed the icon...