Has your email stopped arriving to the device? Follow these steps to restore the service books to the device:
Step One - Hard Reboot:1. Remove battery from the device
2. Leave the battery out for at least 30 seconds
3. Replace battery and let the device reboot
Step Two - Register on Network: (if step one did not solve issue)1. From the device go to Options
2. Select Advanced Options
3. Select Host Routing Table
4. Select menu, then 'Register Now'

Images:Step three - Send Service Books: (if step two did not solve issue)1. Log into your providers BIS site
2. Click the link to resend the service books.

Here is the global list of BIS carrier sites:

Global BIS List

Carrier specific links: (If your carrier is not listed please click the global link above)
Cingular BIS Log In

Nextel BIS Log In

Rogers BIS Log In

Sprint BIS Log In

T-Mobile BIS Log In

Verizon BIS Log In

For example, on T-Mobile:
a) Log into your my T-Mobile account and select 'Setup BlackBerry Internet Email'
b) Select (left menu box) 'Service Books'
c) Select 'Send Service Books'
Step Four - Call Service Provider: (if all of the above fail)1. Call your provider and have them check the provisioning of your account.