HELP! Jiayu g5 Speaker Problem

[Twotems]

Sorry, my mistake. The softphone sound is coming through the earpiece but nothing at all comes through the speaker on any function including the standard dial pad. It's looking like a hardware problem but I still can't rule out software entirely. I really don't know what else to check and I don't know how to flash roms etc etc even though the phone is rooted. I'm a relative novice at these things. I've installed Soundabout Pro and run the touch sounds through the earpiece whilst also disabling the earphone sensor but still have no sound through the speaker. I have DualSim Ringtone installed and first noticed the problem when it updated. So I uninstalled it but no joy there.