Oppo booste ses smartphones avec sa «RAM Expansion Technology»
OPPO - Do not let anything stops you, with RAM Expansion Feature now you can extend the RAM space up to 19GB and enjoy the use of multiple APPs .at the same
Oppo A57 Ram expansion // How to increase ram Oppo A57 New version - YouTube
OPPO RAM+ Expansion Gives 7GB More RAM To Reno 5 Phones - SlashGear