I'm with Orange and contract is up in March so currently looking at options. I don't get a signal at all in my house and have to reach out of a window to send a text message. Orange promote signal boost using UMA but is is only on a very limited range of phones.
Rep on the phone yesterday said that if I take out a 4G contract my signal will improve as it uses more powerful masts. I don't want 4G and would be happy to just be able to make a call in my house. I'm very sceptical about this, do you think there is any truth in it? They have offered a phone on trial and return but I can't really be bothered with the hassle if it is likely to be rubbish