Help! ! ! Why does the prompt box always pop up when editing short messages: cellular data is turned off, cellular data is turned on, or data is accessed by WIFI?

1 MMS: If there is no setting option for setting-general-network-cellular data network, please take out your mobile or Unicom card with a needle and put it back after 20 seconds. Wait until the signal jumps out, and then you enter the settings and see that there is an option to set cellular data! Yes, it's finished. APN: CMNET APN: CMWAP MMSC: MMS da1l1:10.0.172 MMS size: 50000. Ok, after setting these settings, go directly to SMS settings without restarting. Looking inside, there is already the function of MMS. If you don't see MMS after setting, try again! {Please search for the parameters that Unicom users want to set in this forum! } 2 facetime: settings-mobile phone. You can see the option of facetime, which shows waiting for activation. Pull to the bottom of the SIM application, click in, click on any item, then exit, and then turn on the switch of facetime. After a while, you will be prompted that facetime has been activated. "Contacts who make FACETIME calls with you will share your phone number."