May be the case of you using the same sounds in your E caller as every one else in the area uses. Nice thing about the GC 350 and 500 is the removable SD card so you can buy extra cards to use sounds no one else uses. We do not have many wild pigs here, very rare to sight one yet we use that little piggy call to great success.
Until recently I use a MP3 player and a home made call, would never have boughten a store call if I could have been smart enough to figure out a remote for my home built unit.
I also can control the Decoy AD400 attached to the GC350.


Al