Removing incoming digits


I’m really new to this so please bear with me. I installed & set up my forst FreePBX with a sip trunk & so far so good. I can make outgoing & recieve incoming calls to land lines.

My problem is this. When an incoming call comes in, it displays the number without the 0 at the beggining so when I try to redial a missed call it doesn’t work.

I would like to add the 0 back & also prefix it with a 9 to get an outside line however, I do not want the 9 to be visable!!

Does anyone know if this is possible. Thank you in advance of your assistance!!