[slijin]

Our scouting is usually paper-based, but in recent years we've used a 3G/4G dongle from Spring to get the job done (though it was parent supplied). They work very nicely; you may want to look into using a similar one (they're referred to as USB modems/dongles).

Be careful when tethering phones, because many companies, T-Mobile included, will either incur extra charges or prevent you from tethering. I'd recommend calling Customer Service to make sure that that specific Monthly 4G plan (off the top of my head, I think that's the one you're looking at - correct me if I'm wrong) allows you to tether the phone.