GiffGaff, well I thought they were good, until signal issues, then PAC issues were the worst, decided to change to another network, was given a PAC code with a long date till end of the month, other company can't use the code because GIiffGaff disconnected my number the next day, not even giving their date time limit to change over, now I am having technical issues trying to retrieve my original phone number... I WOULD NOT RECOMMEND THIS COMPANY TO MY WORST ENEMY.... I need my old number for health reasons... they DO NOT CARE ABOUT YOU AS A CUSTOMER... very dangerous company, I'd you have health problems when trying to change over company's.... AVOID THEM LIKE THE PLAGUE....