<i>Their current trackers are 3G only - and most countries are shutting down (or have already shut down) their 3G GSM networks.</i><p>What? Some operators are closing 3G networks, but not, I think, &quot;most countries&quot;. Frequency allocation is moved to LTE, yes.<p>But 3G modems fall back to 2G (GSM) which is&#x27;nt going away any time soon in most places (yes, there are exceptions), and 2G is quite enough to send  location info.