Chosen Solution
Hello! I replaced my iphone´s battery, I have done it several times and always everithing perfect but today I had a problem. After the battery replacement my iphone 7+ is in no service mode, is not responding to the command *#06#, doesnt recognize the sim card ejection and the cellular option in settings is frozen (completly blocked). Does anyone knows what can I do or what can I have done wrong?
It is most likely one of the chips responsible for cellular reception and sim card detection which is called baseband have developed a loose connection to the board. These are fairly common faults due to their common weak spots which are the power button and sim tray which are exactly adjacent to components such as the touch IC on the 6 plus, for the 7 and 7 plus it’s the baseband chip and the audio chip. To get this fixed it requires someone with micro-soldering to reinforce the broken connection(s) under the baseband chip. There may be someone reputable locally that offers this type of repair.
