I've been using the Heayzoki USB Modem for my international trips, and it's been a rollercoaster. The plug-and-play promise worked magically in Mexico with my Telcel SIM—no APN tweaks needed. But when I tried a T-Mobile SIM back home? Solid red light. Dead.

The 3200mAh battery is either a hero or zero. One user reported 12 hours, but mine conks out after 3.5 hours of video calls. Pro tip: Keep that car charger handy—it saves lives during airport layovers.

Speed-wise, don't believe the 5G hype. My '5G' SIM delivered snail-paced browsing, though it handled email decently. The range is quirky too—strong in my hotel room but drops if I step into the bathroom (yes, I tested this).

For digital nomads: This could be your backup buddy if your carrier plays nice. But that 'works worldwide' claim? More like 'works sometimes-with-some-carriers'. Pack patience with this modem.