Went away a few weeks ago and had to switch mobile carrier when i went over. in the past the carrier has always switched automatically but this time i had to go into settings and do it manually. Now im back and ive just permenantly got no service. Went back into settings to try switch carrier back manually again but its not working. just wondering what to do or how to fix because i havent been able to recieve or send texts or calls for over a week!

Thanks,

ciana