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Very good question, I am unsure because sometimes it needs a good connection to continue mining. I will say this, last month I used 3.24 GB of TOTAL data. I stay on WIFI when I can but for the most part, it didnt drastically affect my data usage. That includes mining.

Did you mine the entire month? I got it up and running. Looks good so far, almost have 1 coin in just a few hours.

Mined close to 3 weeks worth. Yep, whats your hashrate? You should be getting around 10 coins a day. Transfer to an exchange when you want.

between 30.5 and 30.9. Is that good/bad?

good rate, i also recommend using my referral code if you can E24AD9
its under the more section