Nokia 2100 dual sim cover.
- allows you to use two sim cards in one phone
- no need to cut your sim card like with similar products
- more convenient than removing your back cover/battery every time you want to swap sim cards
- combine business/personal lines and address books on one handset
- switch between networks easily - no more coverage problems!
- also known as "twin sim covers"
How they work: the 'sim card' from the dual sim cover fits into sim slot on your phone whilst your two sim cards fit into the back of the dual sim cover. Your phone then operates as usual but allows you to switch between two sims without removing the battery and back cover first. To alternate between sims simply turn the phone off and on again or flick the switch on the back of the dual sim cover (product dependant).