I use BT for landline and BB, averaging about £56 a month. Download speed today is 13 mps - about the norm, and upload only 1.3 - never understood why the two are so different, but then there isn't much I do understand in this field.
My mobile is with 3 - no complaints, but then I scarcely use it for phone calls, and not much for texts - prefer, when possible, to use the Ipad
Mike