On March 15, netizens @freefishmaan said that after updating the iOS system, the mobile phone appeared to be stuttered in the background, and the signal was lost for no reason, and after he replaced a SIM card, these problems were all solved.
Just Xiao Lei is also using the iPhone 13 mini, but also uses a 9-year-long Unicom SIM card, there will also be signal loss for no reason, Xiao Lei focused on the following problems. Xiao Lei used the Xiaomi Mi 10 Pro before, and there has never been a signal loss problem, so this matter has a certain relationship with the iPhone.
The loss of the signal occurs in the case of small thunder, mainly in the place where the signal itself is not good. The signal of the place where Xiao Lei lived before was very bad, and sometimes when he woke up, the mobile phone completely lost the signal, and the restart and switch flight mode could not solve the problem immediately.
When Xiao Lei encountered the on-off flight mode could not be solved, he began to switch the machine frequently, and I encountered this situation two or three times in total, each time it was restarted while moving, so it was not ruled out that it was moved to a good place with a good signal to solve this problem.
The full name of the SIM card is subscriber identity module, which means user identity module, which is mainly used to identify the identity of the user. Sim card use for a long time may indeed occur oxidation, wear and other issues, thus affecting the normal connection of the signal, which can be solved by replacing the SIM card.
If the user wants to replace the SIM card to try to make the network faster, this is basically impossible to happen, so it is better to go to the number porting network. Now, China Mobile's 5G coverage is relatively excellent, and it has built the N28 band with China Radio and Television, which has a wide coverage.
As for the serious problem of killing the background, the iPhone 13 mini has only 4GB of storage, and Xiaolei has an iPad with 2GB of storage, and the former's background retention is still better. However, when there is a game in the background, the game still cannot stay for a long time. As for the problem of caton perm, Xiao Lei is usually used more lightly, and the hot is not too serious. If the user suspects that his mobile phone has a similar problem, he can consider changing a new SIM card, and he does not want money to change the card anyway.