On what platform did 0855 send the message?

System: HarmonyOS System 3

00855 is the international long distance area code for Cambodia. The telephone number starting with 00855 is usually dialed from Cambodia, but it is not sure about 100%. It may also be the special service number of telecom operators, VoIP or even a device that can set its own display number. Generally, most of these numbers are network virtual numbers, and the location information of different regions can be set at will, so sometimes the numbers found out are not necessarily the phones in this region.

This kind of phone call or text message is just a phone call or text message for promotion or harassment. You can hang up the phone directly, or you can mark the phone as a sign of harassing calls. If you send text messages again, you can set the function of intercepting spam messages on your mobile phone.