O2 CALL TO CUSTOMER SERVICE I wanted to see if upgrading from a Pay as you go iPhone (with a free unlimited web n wi-fi bolt-on), to the simplicity tariff would allow you to choose a second bolt-on whilst keeping the original. Unfortunatley its only on pay as you go Still, i will use wi-fi spots by entering the mobile number of the payg sim, and choose unlimited data as simplicity bolt-on. UPDATE #2 Will be phoning O2 tommorow to see if upgrading from payg to the simplicity tariff will allow you to keep the original unlimited web/wifi bolt-on from payg, and choose a new bolt-on for the simplicity tarriff. Come back tommorow! UPDATE: Can someone clarify if this will work? - it will work Pay and go iPhone 3GS from here: http://shop.o2.co.uk/update/paygo.html Free 12 month unlimited web and wi-fi bolt-on included. But use a O2 simplicity sim for the iPhone @ a £20 12 month contract And when connecting to wi-fi spots, enter the mobile number of the payg sim And for other data excluding wi-fi, choose the unlimited web and wifi bolton for the simplicity sim tariff. Im new to mac rumours and to the iPhone, but i'll join you guys in being outraged at o2 and Apple (and AT&T, even though im in the UK). Anywho i've read around and learned my lesson, i dont want to be tied down to an 18 or 24 month contract like many of you unfortunate people, what with a new iPhone this time next year almost inevitable. So after reading this: http://crave.cnet.co.uk/mobiles/0,39029453,49302556,00.htm Im going for o2's simplicity sim-only tarriff - 12 months @ £20 for the sim, and one free bolt-on. Then just buying a 16GB pay as you go for £440. Total spent will be £680. The downside is that visual voicemail and unlimited cloud wi-fi are not included. But choosing unlimited wi-fi as the inclusive bolt-on solves one problem. Im wondering if you (more experienced users), think this is a good idea. And also if there is an app for visual voicemail.