

Note: You can press and hold the Alt key, and then type nnmll to change the signal indicator bars to the numerical value. The value should be between –40 and –100. To check the signal strength of a BlackBerry smartphone, complete the following steps: The signal strength of a BlackBerry smartphone should be between –40 and –100 dBms. You might experience issues with voice quality if you have low or intermittent signal strength. This menu displays information about the mobile network, the services available for the BlackBerry smartphone, and allows you to verify if the BlackBerry smartphone user has a voice plan. On the Home screen, click Manage Connections. Follow these steps to verify that the BlackBerry smartphone user has a voice plan. The BlackBerry smartphone user must have a voice plan in order to make or receive calls. Verify that the BlackBerry smartphone has been correctly provisioned for a voice plan

Make sure the device has been activated on the wireless network. If no activation has taken place, the BlackBerry smartphone displays an Activation Required message. Make sure the smartphone has been activated on the wireless network

If the issue persists, proceed to the next troubleshooting step. Try the following actions to resolve the issue.
