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Report Abuse. The Kindle Fire HDX does not offers SIM card slot and the model you mentioned is WiFi only, which would provide you internet only when connected to a WiFi hotspot, you cant use internet outside WiFi hotspot as there is not network provider.
To insert a microSD card: Hold your Fire tablet vertically, with the front-facing camera in the top center. The microSD card slot will be on the upper right side of your device. Open the microSD card cover and turn it slightly to show the microSD card slot. Push gently until it locks into place.