Mobile phones often have some strange numbers to send text messages, how to block them?

Short message filtering service mainly aims at the harassment of spam messages or malicious messages, and provides filtering means for users. After subscribing to this service, users can set the filtering conditions of short messages by number, time period and keywords, and the short messages that meet the filtering conditions will be automatically filtered out by the system. In this way, users can reject spam messages and avoid malicious harassment. For more service benefits, click on "official website" customer service 220 below to answer your questions.