Zte MF29A - Page 38

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If you select Modify, the modication parameters are shown in the following gure:
Type the old PIN code, and then type two times the new PIN code. Click Apply to
conrm your conguration.
NOTE: Three times consecutive wrong PIN code entries will block the (U)SIM card.
To unlock it, you need the PUK code. The PIN code and PUK code may be offered
together with the (U)SIM Card. If not, please contact with network operator.