Nokia Lumia 710 FW version

[Jey Si]

I recently updated my 710 to 7.8, when tried to install bluetooth and ringtone maker apps, it gave me an error message stating that the app is not yet available for my device. I was thinking that the FW version is the culprit because my FW version is 1600.3036.8853 instead or 8858. Any thoughts?