Having just been informed of a price hike by my current provider - Breathe - I decided to look for a better deal. As my phone is still with BT I decided to check them first. now i live in a rural area with no upgraded exchange or fibre etc so I'm in the 'up to 8 meg' category, nevertheless i am quite satisfied with the fairly constant 6.5meg that i get from Breathe. I was surprised therefore to find that BT although offering up to 16meg could only estimate 3.5 meg on my line. I have checked with several neighbours who are on BT and sure enough none of them gets more than 4meg - including my immediate next door neighour. I have checked my line with lots of different speed tests and all of them show 6.5 meg plus. So why is my line faster than my neighbours and why can't BT or any of the other ISPs i've tried estimate more than 3.5 meg. AND if i change ISP how can I be sure that I wont lose my current satisfactory speed?