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Device guides for

OPTUS E589 4G Mini WiFi Modem / Windows 7

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Writing and sending SMSInserting a SIM into my routerChanging name and password for my Wi-Fi HotspotCharging the battery for my router

Turning use of PIN on or off

If you want to protect your SIM against unauthorised use, you need to turn on use of PIN. Once done, the PIN needs to be keyed in when you turn on your router.