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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.
As of 2014, Amazon's Kindle Fire HDX line of tablets support a 4G connection for an extra fee. The service is supplied through AT&T or Verizon, and requires a monthly fee for service. The older Kindle Fire HD does not include a cellular modem, and can only connect using Wi-Fi.