About mining without a PC, I must admit I do not know about this. But I would still need the PC to monitor my mining, right? Please enlighten me on this!
I looked into using a USB dongle, but if I was going to pay for the dongle data plan, then I might as well pay for electricity at home using wired connection.
Currently my phone data plan give my 3GB of data, but I can upgrade by paying just a few bucks.
To try it out I would buy off ebay an S1. Will not make money but will be very cheap and sets up and runs exactly the same as an S7.
Yes you need a PC for setup, you can however connect to the miner over the Internet, once setup miner will run on it's own. You can then log into the miner to check it or make changes. Or for a quick check that it is hashing you can log into the Pool it's mining at and look at it's hash rate there.
Rich