Te lo dice la propia página de Opera: seguramente no funcionen cosas, pero ahorrarás datos!
What is Extreme data-savings mode?
Extreme savings gives you the tried and true compression used in previous versions. This compression is heavy-duty, packing pages, images and text down to as little as 10% of their original size. It’s great for travel when you are worried about roaming, or for when you are on congested networks. Extreme-savings mode uses servers to break down webpages and deliver the true content, without all the frills. Pages may not render exactly as intended, but you’ll see amazing results in the amount of data being saved.
Te lo dice la propia página de Opera: seguramente no funcionen cosas, pero ahorrarás datos!
What is Extreme data-savings mode?
Extreme savings gives you the tried and true compression used in previous versions. This compression is heavy-duty, packing pages, images and text down to as little as 10% of their original size. It’s great for travel when you are worried about roaming, or for when you are on congested networks. Extreme-savings mode uses servers to break down webpages and deliver the true content, without all the frills. Pages may not render exactly as intended, but you’ll see amazing results in the amount of data being saved.
help.opera.com/en/mini/android/#savingsModes