Is it safe after turning on the bomb protection function of a mobile phone?

Not necessarily.

The SMS bomb SMS emergency protection service is a personal protection service launched by China Mobile to deal with SMS bomb SMS attacks. When users are harassed by SMS bombs, they can proactively apply for SMS bomb emergency protection.

After the user activates this service, the system will intercept all text messages sent to the user within the protection period, including port type fixed-line international numbers, to prevent users from being harassed and text messages sent from mobile phone numbers. within interception range.