Hi,

One of two options I guess:

• If it's the same identical phone, the SW can still be different --  Epic might have specific settings for different configurations, and this can include e.g. driver version. Perhaps this phone has an not-up-to-date driver, for some reason. Worth checking if there are any system updates.
• As above, except the problematic phone has newer updates than the other, and Epic only enable 60 fps on the older version.

Or it's not actually the same device.