A:AnswerThis can not read sim cards. Sim cards have the phone carrier info and contacts, they look like the gold chip in debit/credit cards. This item reads SD cards which have a row of gold connectors along one edge.
A:AnswerThe slots are both on the same side, and you can have one SD card and one micro-SD card in the reader at the same time. When I plug it into the USB jack of my PC tower, the slots face downward, but the cards won't fall out. Hope this answers your question.
A:AnswerThis Card Reader supports a variety of memory cards, the first slot supports your Micro SD, T-FLASH, Micro SDXC and Micro SDHC cards, and the second slot fits your SD, SDHC, SDXC and Mini-SD cards.
A:AnswerIt means this device is compatible with USB 3.0 ports or below.
The card reader supports Micro SD, T-FLASH, Micro SDXC, Micro SDHC cards, SD, SDHC, SDXC, Mini-SD cards and CompactFlash (CF) cards.