小白求助大神，看看sim800c注册的问题

xue1314gx

这是串口返回的信息，求助这是那一块有问题？万分感谢！

[20:32:08.781]收←◆at
[20:32:08.811]收←◆
OK
[20:32:24.088]发→◇at+csq
[20:32:24.163]收←◆at+csq
[20:32:24.210]收←◆
+CSQ: 19,0
OK
[20:32:45.912]发→◇at+csmins?
[20:32:45.992]收←◆at+csmins?
[20:32:46.047]收←◆
+CSMINS: 0,1
OK
[20:32:57.560]发→◇at+creg?
[20:32:57.691]收←◆
+CREG: 2,3
OK
[20:33:13.225]发→◇at+cops=?
[20:33:19.164]收←◆
+COPS: (2,"CHN-UNICOM","UNICOM
[20:33:19.197]收←◆","46001"),(3,"CHINA MOBILE","CM
[20:33:19.224]收←◆CC","46000"),,(0-4),(0-2)
OK