I routinely use my Remote Rig setup to control a Kenwood TS-2000. I am using the personal hot spot of an iPhone 6s+ running on T-Mobile 4G Internet service. I have the iPhone tethered to a GL-inet "Slate" mini travel router via Apple Lightning cable. In turn, I use one of the router's hardwire Ethernet ports (not WiFi) to the Remote Rig box. It works just fine most of the time.
The only problem I have had was major event cellular congestion that starts limiting data throughput and drops connections. My worst experience was at Dayton this year. 15-20,000+ cell phone users in one area! The cell networks just buckled! But at casual appearances at club meetings, Field Day, fast-food impromptu meetups, etc it works perfectly. Normally, I bring my own connectivity, but once I used it over the free WiFi at a Taco Bell.
This link shows a pic of the setup.: <
http://wa8lmf.net/ham/RemoteRig-Setup.jpg >
The TS-2000 control head, the RemoteRig box and a Monoprice powered speaker are stuck-together with high-power Velcro. Underneath the RemoteRig box, behind the speaker is a 12 VDC 2AH lithium battery pack. It will power the setup for over 10 hours. You can just barely see, behind the Kenwood head a homebrew tone-activated soundcard interface. This is inserted inline between the mic and the RemoteRig mic jack. it automatically disconnects the mic and keys the RemoteRig "send" when digimode audio is applied from an external tablet, phone or laptop.
The RemoteRig audio codecs are clean enough to pass all digi-modes I have tested, including the very demanding "EasyPal "digital SSTV". This has been a lot of fun originating "LiveCAM" SSTV from wherever I happen to be.
Stephen H. Smith
WA8LMF --at-- aol.com