This guide describes how to replace the SD card of the Nokia 3300B.
Flip the Nokia 3300B over with the back-side facing towards you.
Gently press the button on the back of the battery cover to release the cover and slide up.
Lift the battery out of the back of the phone.
Using your finger, or a pair of tweezers, press down on the tab below the SD card.
The card will pop out of its case. Remove the card.