I used this while in Tanzanis and UK earlier in the year. Calls worked fine at .20$, and data roaming worked fine albeit slow. Google maps worked fine, albeit slow (I did download maps in advance) and texting worked and whatsapp, email, etc.

but, in the end I cancelled this sprint plan (was my corporate then business number and plan on SERO) after uh, 17 years. They just couldn't get coverage up in my area (bay area) and there are now even cheaper options than SERO