Particular mention to Joanne and Grant in Reading Oracle store. After 6 weeks of trotting into Broad Street branch , various email chats and telephone calls with EE customer service to sort out my problem( whatsapp wouldn't send or download photos when not on wifi) they took time to triple check everything. Grant suggested a complete reset of my network settings and Bingo, it worked. Problem solved. So I'm very happy now, especially with them. But really EE should have done this in the first place.