Prompt that the received SMS is an overseas number but there is no SMS.

If the signal in your place is unstable, the network is temporarily missing, or affected by other aspects (magnetic field, tunnel, or other network blind areas), this situation will also occur in some closed places (elevators, subways, underground garages, toilets), which may also lead to the temporary unavailability or delay of SMS.

In another case, due to the network settings, if the access point is not set correctly, the multimedia message cannot be received. Most of users' questions focus on Android models. Although there are many settings on the Internet, most of them still can't be used normally.