Been with Three for around 9 month of a 18m contract.
Always had really bad signal inside my house. In many places i have no signal! This is extremely annoying as sometimes i walk out the door, get 3 txts, and missed call and voicemail alerts if someone has been trying to get in touch.
When i'm out and about i also often get droped signal in calls.
Also, strange how this happens - i will send a txt, and not get a reply. Hour later ring the person i sent the txt too and as i ring get the txt that they sent back to me 40 minutes a go for example.
What can i do? Never had this problem with other networks.