I will help you.
Before put your sim card.You must check whether it's your Motorola Razr mobile phone locked to any one of the network provider or not.If you have any locked one.You will need to unlock your mobile phone.You can easily unlock your mobile phone using network unlock code.It's the best and safe way to unlock your mobile phone.You can get an unlock code from your service provider or else try to buy an unlock code from any one of the online unlocking service provider.If you need an unlock code visit theunlockarena.com Here you can unlock your mobile phone within a day.