I purchased a Vodafone handset & sim card at a retail outlet earlier today.... After charging the phone and trying to put the sim card in it states "invalid sim" which is rather weird. Yes the sim card is in the right way i have tried someone elses sim card and it reads and works fine...... I notice the sim card is dated 3.1.2010.. Do sim cards expire? Obviously i;m taking it back on the next business day but i just wondered if it can be "made" to work through customer services....?