Those able to access the XLTE service will see faster peak data speeds. And during times when Verizon's regular LTE network is congested with users, the XLTE pipeline has the necessary capacity. According to PC Magazine, download speeds as high as 80Mbps have been achieved on the XLTE network. In case you're wondering, most of Verizon's LTE signals travel over 10+10 MHz of 700 MHz Upper C Block spectrum. XLTE service is basically LTE delivered over Verizon's Band 4 LTE AWS spectrum. In every major city east of the Mississippi, the carrier is using 20MHz + 20 MHz AWS spectrum, resulting in faster data speeds in those markets.
Verizon's website lists 27 of the 28 devices that support XLTE. These models include the Apple iPhone 5s, LG G2, Samsung Galaxy S5, Nokia Lumia Icon, HTC One (M8), Motorola DROID Mini, Apple iPhone 5c, Motorola DROID MAXX, Samsung Galaxy S4, Motorola Moto X, LG Lucid 3, Samsung Galaxy Note 3, Samsung ATIV SE, Samsung Galaxy S4 mini, BlackBerry Z30, BlackBerry Q10, LG G Pad 8.3, Apple iPad Air, Apple iPad mini with Retina display, Samsung Galaxy Tab 2 (10.1), Samsung Galaxy NotePRO 12.2, Samsung Galaxy Note 10.1 (2014 Edition), Verizon Jetpack 4G LTE Mobile Hotspot 5510L, Verizon Jetpack 4G LTE Mobile Hotspot MHS 291L and Verizon 4G LTE USB Modem UML295.
You can check out Verizon's infographic by clicking on the slideshow below.
source: Verizon via FierceWireless