Amazon Kindle Fire HDX 7 was officially announced in September 2013 , Device released in September 2013 Mobile Network Support and BandAmazon Kindle Fire HDX 7 have No Card Slots, Amazon Kindle Fire HDX 7 not support any GSM Based network providers. and there is no 3G Network Band Support, there is no flight mode support.Device Body Design and Display Amazon Kindle Fire HDX 7 is a Tablet device and it have device dimension