I asked where and not when
. As where the phone came from usually decides which model the phone is.
But as you worked out, you have the wrong model. I don't think it's possible to change the r800i to the r800a as the frequency support is a hardware thing, not a software thing.
HTC One M7 - Sense 6.0, Android 4.4.3, Stock Kernel - Active
Google Nexus 10 - Android 4.4.4, Stock Kernel - Active
Sony Ericsson Xperia PLAY - CyanogenMod 11.0
, Android 4.4.4, CM 11.0 Kernel