1. Open the flight mode for five seconds, then turn it off, and then see if your signal is full of blood.
2. Set the operator-turn off the automatic, choose to be a search network-China Mobile.
three. Settings-General-Restore-restore network settings.
Some software plugins may call the communication process in the iPhone, leading to system conflict and unstable signal. But I did not specify which procedures, so it may cause indifferent killings … I narrowed the original 10 -page program to 4 pages. In the end, I think the result is small, but I think it will be good. Harm.
This is what I found. Some people may think they don’t think so. I use Griffin’s big shell. A few days ago I went to the countryside. The signal is not good (only 1-3 grids), but I find that after removing the protective case, the signal is significantly stronger! It seems that the “letters” sensitivity settings will actually decrease … This difference may not be felt in areas with strong signals. The most thorough method I guess is to re -swipe the system, install the software plug -in as little as possible, and finally use a new SIM card instead of it, the signal problem can be solved. If it still does not work, maybe the worst situation is-the communication module is damaged … but I think it is impossible. Apple also knows this problem, you can try to update mobile software.
Some people say that this is a problem with SIM card aging. I have been in area M, it has been used for more than 3 years, and the chip scratches are more, but the use of N95 is very good. So I only changed a new card, free once a year. It feels better, you might as well try it.