Q: HELP

When i reply my friend messages with using 'iMessages',my friend will saw i using email address but not phone number??So how i can solve it problem??I had try restart / reboot / reset internet.All can't work.

1) iMessage it show ' waiting  for activation' more than 1 hour aldready

2) 'Send & Receive' it should be can select 'phone number' or 'email'..but i only can choose 'phone number'

3) Normally in 'iMessage' will have 'start new conversation from',But my phone never have show.

PLEASE HELP!!

Thank you