INTRODUCTION You don't always have to go to your carrier to install your SIM card. Installing a SIM card is a relatively easy process. Follow this guide on how to change or install a SIM card for the BLU Studio 6.0 HD.
Next, gently slide your thumb (or plastic tool if you prefer) down the seem running the length of your Blu Studio until the rear panel is completely removed.
Your rear panel should be placed nearby and in a safe location until you are finished with your task.
Step 4 — Find out if your Blu Studio 6.0 is "unlocked."
Look at the sticker on top of the battery housing and note the model, part number and type.
Research this information to find out if you have an unlocked version of the phone.
If your phone is unlocked you can use any mobile network SIM card. If not you must replace the SIM card with a card from your carrier.