Do you have any basis of fact for the allegation of 'dirty tricks' you accuse the major players of?
You are free to leave any company offering a PAYG service by requesting a PCC code by text which they must provide immediately upon request.
You certainly do not have with giffgaff
total freedom to do things your way with what suits you entirely and on your own terms not the on the terms of these big companies. How they try to tie you to them in every way possible.
giffgaff have T&Cs and fair usage policies covering all aspects of the service
- EU Roaming
- Data Usage
- Group texting
Which are strictly enforced, more strictly than many other networks.
giffgaff is a good provider of mobile services, as are many of their competitors.