Used sprint for a long time, and they were garbage. Took a huge road trip around the country, and as soon as you leave Iowa, everything out west was roaming—except for large towns or cities.

Switched to T-Mobile 2 years ago, and their service is lightyears better. Even in rural areas (surprisingly). Best part is it comes with unlimited everything—including hotspot data, and you get unlimited everything in Canada and Mexico. My friend has dual citizenship in the England, and uses his T-mobile phone in the UK (France, Germany, and southern England specifically) all without roaming charges. It’s all included. My other friend travels to South Korea for business and uses t-mobile there too. All without paying a single cent more. Overseas is all included. Can’t beat that.