Help with modchip
 

1. I was thinking about getting a elvis mod, origa 1.0 US chip, neo 2.5, or a no solder mod chip. I was wondering what is the best to get and where to get one installed because the only one I could probably install would be the no solder mod?

2. Also I was wondering what is the diference between the neo 2.5 and the no solder modchip?