Your iPhone already shoots at a higher resolution than the Cambodia eVisa form needs. The only real trap is the file format — iPhones save HEIC, the form wants JPEG. Here is the full 5-minute routine, from white wall to converted JPEG under 2 MB.

Stand about a foot and a half from a plain white wall, face a window so daylight hits you from the side, and have someone shoot you with the rear camera (not the selfie camera) held in portrait at eye level. Keep a neutral expression — eyes open, no smile, no glasses, no hat. Then crop the photo to a square of at least 600×600 pixels and make sure it is a JPEG under 2 MB. The one iPhone-specific step Americans miss: iPhones save photos as HEIC by default, and the form needs a JPEG, so either switch your Camera setting to "Most Compatible" before shooting or convert the photo to JPEG before you upload.



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