Working from the road, I need quality Internet service. No work = no play. One of the best investments that I have paid for has been a yearly membership to the Mobile Internet Resource Center. On their recommendations/reviews, I have both a weBoost 4G Drive-X cell booster but more recently added a Netgear antenna for my hotspot.
The Netgear antenna has become my GO TO for boosting my cellular internet.
The Netgear antenna requires two TS-9 connectors and specifically works with hotspots. I doubt any phones have these connectors. But the current crop of Verizon and AT&T hotspots both have these connectors.