Installing GPS software/maps in an SD Card

[carofsteel]

First of all, apologies to the admin if a live topic exists.

I bought a 2nd hand Isuzu Alterra and the OEM Head Unit that comes with it is GPS-ready/compatible. However, the SD Card for the GPS didn't come with the vehicle. I have Waze and Google Map in my smart phone but I really wanted sana to make full use of the HU and utilize its GPS function. Has anyone tried this? Where to download software and/or maps?
Thanks!

Sir AVT ba HU ng Alterra? Kung oo, kailangan mo bumili ng SD card na preinstalled yung software or hanap ka ng SD card na meron na tapos iclone mo. Pero make sure na yun lang kailangan mo baka kailanganin mo pa ng GPS antenna. Dito dinodownload yun software kung AVT yung HU nakasama sa Alterra: Genuine OEM