First, R-SIM Mini2 is the highest version of unlock iphone in the market at present . The thickness only 0.2mm ,thinner than any other chips in the market ,we have tested again and again ,if the thickness of the chip more than 0.3mm ,it will difficult to insert into iphone 5S, if more than 0.32mm will can not be used for iphone 5s .R-SIM Mini2 uses the best chip packaging technology, With Europes highest quality crystal source manufacturing technology, make the thinnest, the fastest processor chip source AKING, make you enjoy supreme extreme experience in the process of using R - SIM Mini2.
Second, R - SIM Mini2 together with the Nano4S general sim tray self-developed by RGKNSE .so R -SIM Mini2 can be directly used for iphone 4s ,the best function in the world ,this function is powerful than any other chips in the market . And on the software combines CDMA phones iOS7 system, make the CDMA model more perfect for iphone 4s , at the same time, iOS7.1-7.X system compatibility is more stable for iphone 5/5c/5s. So R-SIM Mini 2 is the unique and the first one can universal for iphone4s/5/5c/5s in the world.

Third, R-SIM Mini2 has the function that can lock the carrier , in the sim application, click lock carrier after select the carrier , you can lock the default operator, this means that you no need to select the carrier again when you pull out the sim card, automatically default the operator that you locked .