Today’s SIM card designs take up a significant amount of space inside a mobile device. This space is more and more valuable in today’s handsets which deliver an ever increasing number of features.The fourth form factor (4FF) card will be 40% smaller than the current smallest SIM card design, at 12.3mm wide by 8.8mm high, and 0.67mm thick. It can be packaged and distributed in a way that is backwards compatible with existing SIM card designs. The new design will offer the same functionality as all current SIM cards
