i think that the ram is in the SoC of many modern phone, but i know that there is an onlineshop offering ram upgrades for _ really_ old Windows Mobile Phones which have seperate RAM blocks (Ball-Grid Array). And i know that there was a chinese tutorial on how to change the ram byself, altough i can't find it anymore.
As ciolansteen mentioned before, you'll need either an expensive device or try your luck with a heatgun in order to upgrade those.
As ciolansteen mentioned before, you'll need either an expensive device or try your luck with a heatgun in order to upgrade those.