Samsung mobile phone MMS can't be downloaded after receiving it?

1. Turn on the data switch of the mobile phone (the drop-down data of the top curtain lights up/enter the settings of the mobile phone-wireless and network-mobile network-check with data packet) 2. Open phone settings-more-mobile network-access point name-menu-reset to default settings 3. Select to send a new MMS after successful setting (the previous MMS may not be received normally due to network or time problems) 4. Try to replace another SIM card 5. If you can't send and receive MMS normally, please back up your mobile phone data (phone book, SMS, multimedia files). If the problem still cannot be solved, you need to send your mobile phone to the nearest service center for testing.