1. From your device's web browser, go to
http://attwifimanager. Enter your
Username and
Password, then clickÂ
SIGN IN.
Â
2. ClickÂ
SETTINGS at the top of the page.
Â
3. The device’s Mobile Number and IMEI Number will be displayed.
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4. Alternatively, the IMEI and Serial Number can be found under the battery on the back of the device.