My Nokia 5320 doesn't display the sender's name, only the number, and those numbers are already in my mobile phone. What should I do?

See how many contact numbers of people with the same name and surname you have saved.

This may be the case that the name is not displayed in the incoming call or SMS. One reason may be that you saved the same contact twice, that is, Zhang San has two in the mobile phone address book, one is the mobile phone number and the other is the landline number. Don't keep different numbers for one person, but let one person have several numbers under his name. Second, it may be the same mobile phone number. There are SIM cards and mobile phones in your address book, which need to be adjusted. Try not to choose a SIM card and a mobile phone in the address book settings. Either a mobile phone or a SIM card can be used. Third, you have contacts in your mobile phone. You can add a prefix such as 12593 or 1795 1 before the mobile phone number to see if it is possible. In addition, whether the landline is local or out of town, such as people, just add a long-distance area code. Just add the local area code 0 10 when editing, including PHS. When editing landline and PHS, be careful not to add any symbols between the area code and the number, just 0108222xxxxx. Of course, the name should be displayed at this time, even if it is local, the area code should be added when dialing the number.