Yea the wife and i are both on tesco, 20p a min to landline or mobile in pi. never had a problem getting through or quality of the call,
in the 3 months after we got engaged while waiting for our weding date, it cost me 2 and a half grand in calls to call her twice a day, but i had my own corner store with a payzone terminal, and tax deducted the lot, i took her a laptop when i went back for the wedding and it was webcam then while we waited for the spouse visa