I've just replaced a mark 1 sure signal with a brand new one from the shop in Newbury. It's all set up but only the main phone gets a strong signal and even then it's not 3G! There are 3 other iPhones in the house all on Vodafone all registered and all have poor signal! Help! I only replaced the mark 1 box because I thought it had stopped working. Mark 3 no better.
