I haven't been able to find the complete specs for the galaxy 4, so I can't say it'll work or not. There are several IR protocols. The one used for controlling your TV / Bluray player is called CIR. CIR is generally transmit-only. By that, I meaning the remote talks and the television listens. Normally, a remote has no way to listen to the television (if it could talk.) To be able to use IR with a Tamagotchi iD / iD L / P's, the IR must be able to both talk and listen. The IR used for computers and cellphones is called IRDA.