iMessage and FaceTime show wrong number after SIM change

Hi.

Im writing because I need some help with my iPhone.

I have a Factory Unlocked iPhone 5 with iOS 8.0.2 that I regulary use with my local carrier. Last week I was on vacation outside my country and I used a local SIM with a local number (it worked fine). Yesterday I returned home and switched back to my regular SIM card and it seems there is a mess with the Phone number, iMessage and FaceTime.

Let me explain: When I inserted the SIM the phone recognized the phone number without the Country Code (Insted of showing: +Country Code & Phone number its showing + Phone Number). I setup the correct phone number at Settings -> Phone -> My Number (+Country Code & Phone Number). The phone works fine but iMessage and FaceTime are not working because the number is not correct.

I tried to change the number but its greyout (no option to select it). I also reseted the network settings and tried to take out and put in again the SIM but nothing seems to work.

I dont know how to fix this issue. I will appreciate any help.

Please let me know if you need any additional info.

Thank you.