I am an owner of the pocketminer 6.18 and I will share my experience of the device.
Here is a basic overview of my experience with the pocket miner.
The phone itself is a high end smartphone that I can use in everyday life from making calls to emails, play games and obviously mining. I was able to insert my SIM card from my T-Mobile carrier directly into miner and it immediately turned on the phone service without any issue with contacting any customer service or manipulation of the miner itself. I was able to make calls and texts without issues and the phone was clear In hearing and the other person had no problem with hearing me. I was able to get onto the web and be able to watch and browse any website that I choose without any issues.
As for mining was so easy to get into the problem and be able to paste my address right into the app and I was mining immediately. I have mined Swat coins in different ways. I mined using my own SIM card with my data plan. I have also mined Swat using my home WiFi, my hotspot from my iPhone and I also used free WiFi from a building that I work in. So I was mining swat for free today usuing the buildings wifi.