Glossary
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Electronic Lock
When activated the phone will automatically lock each time it is turned off to help prevent unauthorized use.

ESN (Electronic Serial Number)
The unique serial number of a mobile phone that identifies it to the wireless network for the purpose and placing and receiving calls.

EV-DO (Evolution Data-Only)
A technology developed by Qualcomm that addresses data only (no voice) offering high-speed data rates up to 2.4 mbps.