Buying a €1,700 camera-first phone should mean you don’t have to think about the camera. That’s the whole pitch behind the Oppo Find X9 Ultra. It packs dual 200MP sensors and a 10x periscope lens built to replace whatever you normally carry. Except a wave of Oppo Find X9 Ultra fogging reports suggests the camera doesn’t love cold weather.
According to a post on Reddit, one owner in Italy described stepping from 40C heat into a 20C room and watching condensation creep across the lenses. Holding the phone near ice made it worse. But this isn’t a standalone issue as there are similar posts on Reddit as well. A few people say they’ve gone through two or three replacement units, with the same problem showing up each time.
What’s actually causing it
Oppo hasn’t explained this publicly, but commenters have their own theory. They point to the size of the camera glass, paired with the phone’s IP69 water-resistance rating. The idea is that a bigger sealed compartment traps more air. More trapped air means more moisture when temperatures swing. It’s speculation, not confirmed engineering. But it’s the explanation most often cited in Oppo Find X9 Ultra fogging threads. It also lines up with why Apple and Samsung have mostly avoided one giant glass camera shelf.
Not every unit seems affected. Some reviewers who’ve spent weeks shooting outdoors with the phone report zero fogging at all. That inconsistency might be the most unsettling part, since it turns buying one into a bit of a gamble.
What’s telling is that there’s already a DIY fix for it. Pull the SIM tray, bag the phone with silica gel, run a benchmark first to sweat the moisture out. Mobile enthusiasts have turned Oppo Find X9 Ultra fogging into a 24-hour at-home repair job. At this price, that shouldn’t be on you to figure out.
