I currently use ProjectFi for mobile data while traveling outside the US. The initial overhead cost is higher as you need to buy a Fi supported phone to activate the voice + sms sim and you also pay for any data used in a covered country, unlike T-Mobile which allows unlimited slower roaming. I prefer pay for $10 for 1GB of LTE speed data when using Google Maps to navigate via car/train or downloading a chunk of e-mail. Fi will credit any unused data from the prepaid data bucket so if you used 500MB, it will issue $5 credit applied to next month's prepaid bill. $10 for 1GB is also a low enough price point for me to forgo a local sim if I have decent access to wifi for data hogging applications. I also use the data only sims in secondary devices like a tablet and it also supports a mifi, where I could choose from region specific models that include more LTE coverage than SkyRoam's unit. The data sims share the same data bucket as the voice+sms sim. Fi Pixel/Nexus phones also have automatic VPN Wifi-Assistant on public wifi networks in multiple countries
https://support.google.com/nexus/ans...where_it_works
Offers a good comparison between Fi and T-Mobile
https://sightdoing.net/project-fi-vs-t-mobile/
TheFlightDeal's summary & $20 off.
https://www.theflightdeal.com/2017/1...tional-travel/
My domestic carrier is Verizon (Prepaid) because that's what offers good coverage in the places I spend 95% of my time in. Data usage is mostly via wifi.
Basically, I can maintain 2 prepaid lines per month for the cost of 1 post pay domestic mostly line. MVNO's are pretty competitive with their pricing. You just need to make sure to setup auto-pay and pick a stable provide to avoid losing your phone number (new activation while you're out of the country would be difficult).
Pixel 2 supports Fi with eSim and a local sim (one or the other, not dual sim standby) if you need a local sim
https://www.reddit.com/r/ProjectFi/c...riers/dojkeqf/ Cell phone reviewers mention good things about Pixel 2 camera.
https://www.frequencycheck.com/model...gb-htc-walleye