Huawei E5730s-2 Quick Start Manual page 14

Verifying the PIN
If the Mobile WiFi's network parameters have been correctly configured but you cannot access
the Internet after powering it on, PIN verification may be enabled. Log in to the web
management page and enter the PIN when prompted. To avoid entering the PIN every time
you power on the Mobile WiFi, disable PIN verification from the web management page.
The PIN/PUK is delivered with your SIM card. For more details, contact your service provider.
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