Samsung J3 - Set Up Your Phone; Remove the Back Cover; Install the SIM Card

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Step 1. Remove the Back Cover
1. Hold the phone securely.
2. Locate the cover release slot and carefully pull the cover
off.
Step 2. Insert the Battery
1. Insert the battery into the opening on the back of the
phone, making sure the gold contacts align.
2. Gently press down to secure the battery.
Setting Up Your Phone