Nokia Asha 503

Find "Call forwarding"

Press Settings.

Find "Call forwarding"

Press Calls.

Find "Call forwarding"

Press Call forwarding.

Select divert type

The current settings are displayed.
Press the indicator next to the following divert types until the function is turned on:

Select divert type

All voice calls

Select divert type

If busy

Select divert type

If not answered

Select divert type

If out of reach

Divert calls to voicemail

Key in +447836121121 and press the confirm icon.

Divert calls to voicemail

If you selected If not answered in step 2:

Divert calls to voicemail

Press the required delay.

Return to the home screen

Press and hold the Return key to return to the home screen.