Xiaomi will soon launch a SIM card that also works as a microSD. Recently, we have seen many mobiles, particularly high-end ones, have been launched without a microSD card slot. But for many, it is necessary to be able to expand the internal storage on smartphones. Now, it seems Xiaomi has the solution. The Chinese brand has just patented this card. But this dual card can only be used on Xiaomi and Redmi devices.