Novatel Merlin XU870 - Manual (Page 36)

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Why do I see the message “SIM not found” when I run
MobiLink?
Your SIM card uses contact points to connect with your XU870. Take
care not to touch or damage the contact points. Use the orientation
notch as a guide to properly insert the SIM.
Why does the LED flash red?
This happens when your SIM card is locked. Enter your PIN code when
prompted. If you enter the wrong PIN code 3 times, you will be
prompted to enter your PUK code. If you enter the wrong PUK code
10 times, your SIM card will be locked forever. Contact your mobile
operator to obtain a new SIM card.
Why does the message “Searching for network” display
continuously when I run MobiLink?
You are outside of the coverage area. Contact your mobile operator to
find out more about coverage areas.
Why can’t I connect to the network?
Check the user name, password and access point name (APN) in your
profile (page 13). If any of these entries are wrong, you won’t be able
to connect to the network.