Ugoroam eSIM 30-Day Real-World Test
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Tokyo → Seoul → London → NYC
30 days. 4 cities. 1 eSIM. I threw every physical SIM in a drawer and travelled only with Ugoroam Daily Unlimited. Here’s exactly what happened, day by day, no filter.
Test Rules
- Phone: latest iPhone (dual physical + multiple eSIM)
- Main line: Ugoroam Daily Unlimited (Japan 3 GB/day → Korea 10 GB/day → UK 10 GB/day → US 10 GB/day)
- Backup: physical home SIM for calls only
- Usage: heavy (4K video, Zoom, hotspot MacBook, navigation, streaming)
Day 1–10 Tokyo (3 GB/day on NTT docomo)
Average: 2.8 GB/day Best moment: Narita Express → Shibuya coworking at 400 Mbps+ the whole ride Near-miss: Kyoto mountain temples → brief 2G fallback → still navigated perfectly Verdict: 3 GB felt like unlimited. Never hunted for Wi-Fi.
Day 11–17 Seoul (10 GB/day on SK Telecom 5G)
Average: 8.4 GB/day (shot way too much 4K) Best moment: Gangnam rooftop bar hotspot to MacBook at 600 Mbps+ Near-miss: Hongdae Friday night crowd → 2G kept Instagram scrolling Verdict: First trip I dared shoot everything in 4K 60 fps.
Day 18–24 London (10 GB/day on Vodafone/O2/Three)
Average: 7.7 GB/day (Zoom + Tube hotspot) Best moment: Shoreditch → Canary Wharf full 5G, hotspot colleague calls zero lag Near-miss: deep Tube tunnels → 2G still sent Slack messages Verdict: London Underground internet now beats most home Wi-Fi.
Day 25–30 New York (10 GB/day on T-Mobile + Verizon)
Average: 9.3 GB/day (Times Square live streams) Best moment: JFK landing → full bars in 30 seconds, subway hotspot never dropped Near-miss: Brooklyn warehouse district weak spot → 2G still called Uber Verdict: 10 GB/day felt truly unlimited in the US 5G is insane.
Only one “failure” in 30 days
Kyoto mountains 2G navigation lagged 8 seconds. That’s it. Hotspot ran 220+ hours. Never dropped.
14 Daily Unlimited plans now live (covering 50+ countries)
United States · Japan · United Kingdom · South Korea · Australia · New Zealand · Canada · Mexico · China+HK+Macao · Singapore+Malaysia+Thailand · Malaysia · Thailand · Europe 30+ countries · more coming
Final feeling after 30 days
I never once worried about signal, top-ups, or hotspot limits. It just worked, every single day, in every city.
Want the same freedom?
Only visiting one or two countries and travel lighter?
→ Classic plans (100 MB–50 GB total)
Drop your next route in the comments — I’ll build your perfect plan.