I've been with Teltik for almost a year now and been very happy. Just heard they are offering a Black Friday Deal.
$15/mo for UNLIMITED Talk, Text + 2GB High-speed 4G LTE Data (reduced speeds after high speed data is used)
+ Mobile HotSpot
$32 UNLIMITED Talk, Text + UNLIMITED 4G LTE High Speed Data!
+ UNLIMITED Mobile Hotspot at 3G Speeds.
+ All pland include the Business PBX Cloud Phone APP. (Includes features such as 24x7 virtual attendant, music on hold and more. It's like having your office in your pocket.
Need help? TelTik has 24x7 support: 1 888 406 2838 and chat on teltik.com