Can Unicom check roaming places now?

Unicom launched the roaming query service on February 7, 2020.

Send send CXMYD first or send 598 instruction to 100 10,

According to the reply message

Then send CXMYD# to 100 10, the last four digits of the ID number corresponding to this mobile phone number, and you can query the information of the roaming place and the records of the last 30 days.