Huawei P smart User Manual page 28

Message
Unblock messages: Touch and touch Blocked contacts. Touch at the end of the phone
number to unblock the number.
Set MMS Message Automatic Download Rules
Set MMS message automatic download rules to prevent costly mobile data usage.
Open Messages and touch . Go to Settings > Advanced.
From here you can configure the following:
Whether to retrieve MMS messages automatically: Disable Auto-download MMS to prevent
your device from automatically downloading MMS messages.
Whether to retrieve MMS messages automatically when roaming: Disable Auto-download
MMS when roaming to prevent your device from automatically downloading MMS messages in
roaming mode.
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