What is the message starting with +852? Can you reply?

00852 is the international area code of Hong Kong. If you receive a caller ID call starting with "852", this is generally not a long-distance area code, because domestic long-distance calls start with 0 and international long-distance calls start with 00. Numbers beginning with 852 can be special service numbers, local fixed telephone numbers, mobile telephone numbers, Internet telephones and devices that can modify caller ID numbers. You may also need to add 0 or 00 before 852 to query "0852" for domestic calls or "00852" for international calls.