0551313 RM-256 N81 China_2G
0551456 RM-256 N81 China_2G 2
0557996 RM-256 N81 CMCC B
0558018 RM-256 N81 CMCC SG

Operators:

0558059 RM-256 N81 PRC CV B
0558061 RM-256 N81 PRC CV SG