The different versions of the D5803 are contained in firmware only. If you have the hardware, you have the choice of changing it to a different region's firmware. It looks like you do have a Latin American version since yours starts with 1290. I'm going to flash my firmware to the US version later tonight.
Stock Z3C firmwares
from XDA thread
Xperia Z3 compact LTE-A [D5803]
23.0.A.2.105 - Unbranded - United Kingdom (1288-4954)
23.0.A.2.98 - Unbranded - Spain (1288-5410)
23.0.A.2.98 - Unbranded - Italy (1289-4008)
23.0.A.2.98 - Unbranded - Germany (1289-4696)
23.0.A.2.93 - Brand EE (Orange+T-mobile) - United Kingdom (1289-4465)
23.0.A.2.93 - Unbranded - GEL [Latin America] (1290-6916)
23.0.A.2.93 - Unbranded - Nordic (1288-5411)
23.0.A.2.93 - Unbranded - MENA [Arabic] (1288-3756)
23.0.A.2.93 - Unbranded - Global (1286-9917)
23.0.A.2.93 - Unbranded - USA (1289-7524)
23.0.A.2.93 - Unbranded - Ukraine (1289-0537)
23.0.A.2.93 - Unbranded - Russia (1289-0445)
23.0.A.2.93 - Promoter