I recently tested Ultra Mobile’s $39/month prepaid plan with unlimited talk, text, and 15GB of 5G/4G LTE data. Here’s my honest take after using it for a month.

The Good: The T-Mobile network coverage is solid in the US—streaming, browsing, and calls worked smoothly. I loved the unlimited international talk to 90+ countries and free texting in Mexico/Canada. Perfect for travelers! The SIM activation was quick (once I figured it out), and the app makes managing data easy.

The Bad: The packaging is misleading—it screams 'unlimited data' but buries the 15GB high-speed cap in fine print. Customer service? A nightmare. Chats took forever, reps dodged questions, and one even disconnected mid-conversation. Roaming outside the US was hit-or-miss; texts failed in Colombia/Venezuela.

Pro Tip: If you need Mexico data, buy their $5 add-on—the base plan’s 15GB doesn’t work there. Also, APN settings might need manual tweaks (annoying but fixable).

Verdict: Decent for US use and light travel, but research thoroughly and brace for客服 headaches.