Zte Optus My Tab User Manual page 102

(U)SIM Card Lock
You can set the PIN password to prevent others from using the SIM
function. The initial PIN code is provided by your service operator.
1. Tap Settings > Location & security > (U)SIM card lock.
2. Select the Setup (U)SIM card lock.
3. Enter the PIN and tap OK.
Change SIM PIN
Before changing SIM PIN, you need to enable it.
1. Tap Settings > Location & security > (U)SIM card lock.
2. Tap Change (U)SIM PIN.
3. Enter the PIN and tap OK.
4. Enter a new PIN and tap OK. Confirm the new PIN and tap OK.
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