When using SIM cards from Movistar and other carriers in the Redmi Note 14, if Movistar fails to send an MMS and keeps resending, it can occupy the MMS channel and prevent other SIM cards from sending MMS. This issue arises because Movistar has discontinued its MMS service, causing the phone to repeatedly attempt sending the failed MMS.
For your reference, the detailed explanation is as follows:
1. The MMS service from Movistar has been taken down, leading to repeated failed attempts to resend the MMS and occupying the phone's MMS channel;
2. This issue can be resolved by deleting the failed MMS sent using Movistar or restarting the device to clear the channel;
3. The latest system version for the Redmi Note 14 has addressed this issue, so updating your phone ensures smooth and normal MMS functionality.