Sprint Nextel U727 manual Updating Your Device’s PRL, To change your lock code

Tip:

Your default lock code is the last four digits of your device’s phone number. If you can’t recall your device’s phone number, go to Menu > Device Info and Diagnostics or call Sprint Customer Service at 1-888-211-4727.

To change your lock code:

1.Select Menu > Settings > Sprint Mobile Broadband - Novatel Wireless .

2.Click the Change User Lock button. The Change User Lock Code window appears.

Note:

Activating your device resets the lock code to the last four digits of the most recently activated phone number.

3.Enter your new four-digit lock code into the dialog box.

4.Re-enter your new lock code.

5.Select a lock status: Unlock to leave the device unlocked; or Lock to enable the lock code feature immediately.

Updating Your Device’s PRL

Your Sprint Mobile Broadband USB Modem contains a PRL (Pre- ferred Roaming List) that was programmed into your device. The version of the PRL specifies the radio frequency channels that the USB modem is permitted to use, and also instructs your USB modem which cell towers to look for when establishing a connec- tion. As new EV-DO towers become available, your PRL will become out of date. For example, you may be in an EV-DO service area, but if your device doesn't have the cell tower information in the PRL, it won't know where to find the new tower.

Keeping the PRL up-to-date provides for faster roaming signal acquisition, improved international roaming, and, on EV-DO devices, better acquisition of EV-DO data services, as Sprint is con- tinually installing new towers that may be closer to you that offer better signal strength.

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