3. Bugs and Stability Issues
As is the case with beta firmwares, they can cause unexpected issues, such as slow down your iPhone, lag or reboot randomly, crash the springboard, etc. It can become annoying when issues start to pop up in the middle of important work, such as a phone call. Beta versions are meant for development and testing purposes. This is why iOS 11 beta is available to developers only so that they can test the firmware and report any issues that are available. The beta stage lasts for three to six months during which Apple fixes as many problems as possible before releasing the firmware to the public.
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