Telecom cards can't send short messages.

This question is simple. It's not that there is something wrong with the mobile phone, but that your card doesn't support the 6. 1 system. Solution 1: If shsh is backed up, please downgrade it. Method 2: If the original shsh is not backed up, buy a new card supporting 6. 1 system. According to my guess, this is not a phone or a card. Did the landlord escape from prison after upgrading to 6. 1 General card stickers need to install dependent patches. I guess the landlord didn't install that patch.