Comparison of T-Mobile and Sprint
T-Mobile and Sprint have very similar international roaming offers (free slow data, free texts, 20¢/min calls), but there are some differences in countries of coverage. I went through the lists for both Sprint and T-Mobile and came up with the following sets of "exclusive" countries that are in one provider's plan, but not the other's. Hopefully it will be of use to some of you.
Free data, free texts, and 20¢ calls only on Sprint:
Andorra
Azores
Brunei
Congo, Dem. Rep. of
Fiji
Gibraltar
Greenland
Jordan
Kyrgyzstan
Laos
Madeira
Marie Galante
Mayotte
Myanmar
Nauru
Northern Mariana Islands
Palestinian Territories
Papua New Guinea
Reunion
Rwanda
Saipan
Samoa
Senegal
Tajikistan
Tanzania
Tonga
Vanuatu
Free data, free texts, and 20¢ calls only on T-Mobile:
Bosnia
Christmas Island
Iraq
Moldova
Monaco
Turkmenistan [no data service; free texts and 20¢ calls only]
Uganda
Zambia