Will a magnetic case affect my phone? sorry if the question is a bit off-topic but any help would be much appreciated.

I have a Samsung S4 [I9505] and I was looking for a good protective case for it. initially I was going for a Slim TPU Gel case but it didn't feel like it would give much protection from bumps etc.

I was thinking of buying a leather case with a magnetic closure but after reading a bit online, people are saying the magnetic flap which closes the case can damage the AMOLED screen, also the magnet that sits on the screen side. So do you think it could be risky to use this case? Would it damage my phone or screen in any way?
There are two things to consider:


Temporary interference with the device operation. Magnets can and do affect the device in various ways. This includes messing with the digitizer, creating dead spots and distortion, and potentially affecting sensors such as the magnetometer. These effects are temporary, but in severe cases could make the device hard to use, or result in misinformation from apps dependent on affected sensor(s).
Permanent damage. There seems to be a lot of controversy around this, but I would still recommend caution unless you know for sure that the specific components in your phone when combined with specific magnet strength and location with respect to the screen, are known to be OK together. As I understand it, there are certain AMOLED screens in older devices that are susceptible, but others that are not. In a large production run device like yours, the OEM may have used different suppliers over time, so it might be difficult to find out before hand if your particular device is susceptible. The specific case you get also matters. If you get a cheapo one from eBay and it damages your screen, you'll have little recourse with the case supplier or Samsung.


If you really need/want a magnetic closure, I would see if you can find one from a reputable manufacturer that has made the case specifically for your device.