If you have bought old Fgtech V5.0 from us before, want to update it to V5.3, you just need to do like this:
First updating way:
1. Ship back the old Fgtech main interface back to us, you can contact our customer service for all the shipping details.
2. Pay the updated fees: 150USD+shipping cost for shipping back the Fgtech main unit to you
3. After finishing the update, we will ship back to you.
Second updating way:
If you don't want to ship back for updating, you can buy the latest Fgtech v5.3 from our website directly, it is also easy and fast.