I dunno who operates my mobile.
I got it from ASDA 'cos they only charge 8p a call and 4p a text. Cheapest PAYG in the country.
THW refuses to let me put her phone on an ASDA sim "'Cos I don't want MY friends thinking I can't afford a PROPER service".
"But it's me that pays for it dearie not you so IF anyone found out your service was from ASDA and thought it "cheap" then it's me that is the cheapskate not you ~ go get a fecking summer job and pay for your own damned phone in future" 
Does anyone here even know which service (Vodaphone, Virgin, Three or whatever) is used by those calling them? No I thought not. It just doesn't show on your screen does it but madam thinks that "Everyone will know"

Who give a fat rat's arse what service anyone uses if it works?
AND If it saves money thus giving her more texts and more calls within her Father pre-set monthly budget I would have thought she would welcome it.