Giffgaff is one of the newer mobile networks, they use the O2 network so coverage is not a problem and they are currently offering 250 minutes & unlimited texts for just £10
Sim cards are made to industry standards 85.60mm length, X 53.98mm width and are 0.76mm thick. There are also a new type of Sim card called a micro-sim they are for the newer iphones
and are smaller with less plastic around the actual chip
A Sim card contains information about the network which is used to keep track of subscriber data and authenticate phone calls with the network. A Sim card has other data like the network providers display name and useful numbers like directory enquiries or top up line.
Contacts – Newer Sim cards can Often Contain more than 250 phone numbers.
Text messages – Sim cards can store SMS messages
All networks have a different limit on the amount of Sim cards you can order for free
02 will give you 4 Sim cards for free and T-Mobile will give you a limit of two Sim cards for free. You should only order the amount of Sim you need to reduce networks costs and environmental costs accosiated with & making sending sim cards that go unused, you could always order a few extras for friends or family or as a gift to someone
Because like all businesses they want customers and in the competitive industry or phone services
they need to stay one step ahead
most stores sell sim cards for 99p - £3 the reasoning behind this is to provide incentive to stores to sell the sim cards and if they were free on the high street people would take advantage and go store to store getting loads of sim cards they would never use