Comparison between K790/K800/K810 Sonny Erickson

Comparison between K790/K800/K810 Sonny Erickson. K790 is the most expensive but he does not have 3G
K800 being the most popular but rather big body size
K810 is pretty good, the model is okay (slimmer than K800) but the inside just like K800

from the design :

K790 :

K800 :

K810 :

And also, you can upgrade K800 into K810 by modificate it. :)