If you plan on using your Samsung Solstice in your daily life, you will need phone service, which requires installing a SIM card. Luckily the task of installing a SIM card is very simple.
Remove the back cover by sliding the cover off of the phone by pushing it upwards, in the direction of the small arrow on the back cover.
Set the cover off to the side once you have removed it.
Locate the SIM Card slot directly above the battery and below the phone camera
Place your thumb on the SIM Card in the slot, press down gently and slide the card away from the slot, until it comes out of the slot entirely
Once you have removed the SIM card, set it aside from the phone.