Greetings!
Firstly, thank you for reaching out with your queries. Allow me to address them accordingly. Here's what you need to know:
How to Upgrade from iOS 9.3.4 to iOS 10 on iPhone
Regarding your initial concern: Is iPhone 5c capable of running iOS 10?
Based on our updated list of devices compatible with iOS 10, we confirm that your iPhone 5c can indeed run the current iOS 10 beta version.
Second Issue: How to Upgrade from iOS 9.3.4 to iOS 10.
Currently, upgrading to iOS 10 beta differs from the process of upgrading to iOS 9.3.4. This is why despite upgrading to iOS 9.3.4, you're unable to upgrade to iOS 10. To resolve this and upgrade from iOS 9.3.4 to iOS 10, follow these steps:
Step 1: Use the Safari browser on your device and navigate to Here.
Step 2: Then, select Settings, and proceed with updating your device as usual.
https://Mytour.vn/nang-cap-ios-934-len-ios-10-5501n.aspx
Alternatively, you can learn how to upgrade from iOS 9.3.4 to iOS 10 as detailed in our article upgrading to iOS 10 beta for iPhone, which you can refer to and follow for upgrading from iOS 9.3.4 to iOS 10 on your iPhone 5c.
