References Productivity Portfolios: Understanding SIM Cards About the Author Misty Rodriguez, born and raised in Orlando, Florida, has been a freelance writer since 2005. You can unlock your SIM card by contacting your mobile phone SIM card for free on request, provided that the contract your expired Remove the law for monthly phones, tablets, and mobile Internet devices Has been active on the T-Mobile network request line for 40 days. Iphone 5s 64gb New Unlocked here. If you read this and will figure out how to unlock the phones, please share your experience with unlocking the iPhone. Because the mobile provider, like Verizon, relies on Sprint branded mobile phones based on a relatively unknown network technology (CDMA) that has been created with a SIM card in recent years, it can not unlock the SIM card of another mobile phone provider. .