假设用户甲始终在小区A的覆盖区内，T3212A=20，甲开机后10分钟接听了1个3分钟的电话

如题。
假设用户甲始终在小区A的覆盖区内，T3212A=20，甲开机后10分钟接听了1个3分钟的电话，此后再没有进行呼叫，那么甲的手机将在（）分钟后进行第一次周期性位置登记。
A.7
B.107
C.113
D.120
真确答案是？

根据协议规定，T3212会在以下情况置0，所以应该从头开始计时：20*6=120minThe timer is stopped (shall be set to its initial value for the next start) when:
- a LOCATION UPDATING ACCEPT or LOCATION UPDATING REJECT message is received;
- an AUTHENTICATION REJECT message is received;
- the first MM message is received, or security mode setting is completed in the case of MM connection establishment, except when the most recent service state is LIMITED SERVICE;
- the mobile station has responded to paging and thereafter has received the first correct layer 3 message except RR message;
- the mobile station is deactivated (i.e. equipment powered down or SIM/USIM removed).