So you want to insert two SIM cards into your phone? The Krimston Two can help. It is a dual SIM case that gives you two GSM lines and keeps your contacts synced. It also provides you with a battery boost when your phone is running low on juice.
To get started, bring a second SIM card, insert it, and you are set. No matter the reason you need two SIM cards, thanks to this case, you can use both conveniently. More information is available here.