1. Switch off Phone
2. Remove the Sim Card (Carrier A)
3. Start your phone without the Sim Card
4. Search for Network (At this point of time, you must get it working as normal, it will show you the Carriers - including A)
5. Select Carrier A (make sure its selected), wait 30 seconds, then Select Automatic
6. Switch Off Phone
7. Insert Sim Card Carrier A & Start Phone
翻译一下：
1.关机
2.把sim卡拿出来
3.不装sim卡重启机器
4.重启之后，进入设置--》通话设置--》网络运营商选择，
5.选择后等待约30秒后，出现网络运营商，然后点自动选择
6.关机
7.插入sim卡，重启，问题解决
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