To see coverage and speeds, i recommend. Mint mobile advertised price does not include fees which turn $15 per month into maybe $18. They are fairly accurate from my experience with.
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These do concern me somewhat. If you have an android phone then download cellmapper and it shows you on their map. Just switched to mint from sprint and i am currently using a galaxy s9 plus which was previously a sprint phone.
Check out one of the coverage map app.
They are based on theoretical maximum of cell. I live in colorado where there is a canyon that is.