DUAL SIM SWITCHER FOR IPHONE 4
REVIEW by Baly23 That’s the switch, it supports 1 MicroSIM and 1 MiniSIM. Avaiable also in TRI-SIM version (1 Micro + 2 Mini). That’s the black back cover. Note the space for the adaptor. I added the velcro, not inlcuded in the package. Insert the smaller part of the circuit in the MicroSIM slot. Put the primary SIM on it. Insert carefully the slot in the iPhone. Turn your phone face-down and eventually use an adaptor MicroSIM->MiniSIM. Put the secondary SIM in it. Use the cover to protect your adaptor and your phone. WIND is my primary operator. Settings>Phone>SIM Applications>Switch Number>SIM2.