O2 
Open up the O2 sim pack, the mobile number and SIM Serial Number Number are printed on the back of the SIM pack.
Take the booklets "And a little Small Print" and "a Dinky little guide to starting up" out and the top up swipe card is contained within this guide. Pop your SIM card from the credit card style plastic and insert it into the phone ( select the relevant handset above)
The O2 Sim doesn't require activation, only the top up swipe card.
How to Top Up Your Mobile Phone
There are three methods by which you can top up an O2 PAYG Sim
1. Top Up Using a credit or debit card by calling O2 (dial 1743 from another O2 Phone) or by calling 08705678678 and follow the instructions or Visiting by www.O2.co.uk/topup
2. They can use the O2 swipe card contained within the SIM pack ( or Pick One up from a local supermarket / newsagent or mobile shop). You then need to register the top up swipe card with O2 by calling 248 (free) from another O2 phone or calling 08705678678 from a regular phone. Once this is done you can visit one of 10000's of locations across the country (such as supermarkets, petrol stations, newsagents etc) and pay by cash or card
3. You can also top up at numerous cash machines across the country and you Mobile Phone will be topped up immediately
For more information on topping up please visit www.o2.co.uk/topup or by calling o2 on 4444 from the phone.
Resources
O2 4444 to top up from the phone
248 to activate the Swipe card
0870 567 8678 from any phone
www.o2.co.uk
O2 Call Charges O2 Call Charges and Price Plans
O2 Network Coverage O2 Network Coverage Checker
AHDistribution Dealer Support 08444994736
support.ahdistribution.com
dealersupport@ahdistibution.com