Some users have reported that they have not been able to upload images from their Apple devices. This issue can be resolved by changing image format that you device saves images as.
HEIC is a photo format created by Apple and used by default in iPhone 7 onwards. The new format has been developed to save you storage space, allegedly without any loss of quality.
Since HEIC is relatively new, there are compatibility issues with many websites devices and apps. For guntrader website you will need to use the more common format, JPEG.
Below is a step by step guide of how to change the camera settings on your iPhone from HEIC to JPEG.
Go “Settings” > Select “Camera” > Select “Formats” > Select “Most compatible” your camera will now save images in JPEG format.