I've been using the KiwiSIM USA Data SIM Card for my unlocked 4G hotspot, and overall, it's been a decent experience. The setup was straightforward—just popped in the SIM, configured the APN settings (I used the default a1.net as suggested by another user), and it connected to T-Mobile’s network almost instantly. The coverage has been reliable in my area, and I haven’t had any major dropouts.

One thing I appreciate is the flexibility of this SIM. It works with multiple carriers (AT&T, T-Mobile, Verizon), so it automatically picks the strongest signal. For my needs—mainly keeping my hotspot running for remote work—the 12GB over 180 days is plenty, and the price is hard to beat. No contracts or hidden fees are a huge plus.

That said, I’ve seen mixed reviews about compatibility. Some users reported issues with specific devices like iPads or security cameras disconnecting frequently. In my case, it’s been smooth sailing, but I can see how that might be frustrating if you’re relying on it for IoT devices. Customer service seems responsive though—they even offered refunds to some users with persistent issues.

If you’re using this for a hotspot or router like I am, it’s a great budget-friendly option. Just double-check your device compatibility and APN settings beforehand to avoid headaches.