Smaller wireless carriers often use more popular networks.
By Eli Blumenthal - Aug. 9, 2021
When it comes to picking a wireless provider there are plenty of
options beyond AT&T, T-Mobile and Verizon. Your cable provider --
particularly if you have Optimum, Comcast's Xfinity or Charter's
Spectrum -- has likely tried to get you to move to their mobile
service over the last year. You also have smaller players like Mint
Mobile, Visible, Boost Mobile and others.
https://www.cnet.com/tech/mobile/google-fi-mint-mobile-visible-which-wireless-networks-do-smaller-providers-use/
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