Here's a quick video on to attach a scanner to your phone.
Socket Klip Case
If you have a Samsung Galaxy 4 or an iPhone 5, you can get a klip case that fits your phone. If you have any other type of phone, you would need to get the universal klip case and attach it to a phone case. You can get one on Socket's website for about $20.
Socket 8Ci Scanner
This is my favorite scanner for scouting. I've tested this on FBAScan and ProfitBandit, and it works well on both. You can get one for about $195 on Amazon.