Anonymous wrote:
Works fine, sometimes call quality is so so
Not sure how poor quality is "fine."
In any case, as mentioned above, these are all MVNOs, which are third parties that buy excess capacity from major carriers (who are the ones that actually own the infrastructure). They should provide similar service under normal conditions, but will be the first to lose service if/when the network reaches capacity. This may or may not be important for the intended use case. I probably wouldn't want service from an MVNO on my only phone, but it might be perfect if you have a land line and only use a cell phone occasionally.