Instructions on inserting/removing your SIM can help with activation issues/errors, browser connection problems, and a blank/frozen screen.
Don't attempt to insert the SIM card while the device is powered on. Doing so may harm the SIM card and/or the device.
Ensure the device is powered off.
From the left edge of the device (display facing up), remove the card tray.
Utilize the insertion/removal tool (or a paperclip) to unlock the tray by inserting it into the provided slot then remove the tray.
Using the side of the card tray labeled 'SIM', insert the SIM card into the tray as shown (gold contacts facing down).
Insert the card tray then press in on the tray to lock it into place.