I have just signed up to a 24 month contract with o2 and chose a Samsung G600. The phone is ok but very slow when texting, however the main problem is that I have no signal at all at home and cannot use the phone in the house. This is a major drawback as I work from home. Will the problem be the o2 signal or a problem with the Samsung phone. I previously had an o2 pay as you go phone and never had any problems with poor signal at home.