Your suggestion to change the DNS settings (January 2015), as a way of fixing slow page loads in Safari, intrigued me. I contacted my provider and they said not to do it, as it’s not for the faint-hearted. They thought it could be a corrupted DNS setting on the iPad and they suggested clearing the history. I’ve done that, but the jury is still out. David Simpson Older devices, such as the iPhone 4s and the iPad 2, use the A5 processor and only have 512MB of system RAM. Every tab consumes some of this RAM and it quickly gets to the point where tabs need to be loaded and unloaded every time you switch, which makes it feel very sluggish. Apple is still selling the non-Retina iPad mini, which is A5-based, so even new devices aren’t safe.
Switching DNS provider is by no means a complete cure, but it can help with web pages that stall part-way through loading. And it’s really not as hard as your ISP is making out. Just Tap Settings > Wi-Fi and tap the ‘i’ next to your Wi-Fi connection. Replace the numbers in the DNS section with ‘18.104.22.168, 22.214.171.124’, without the quotes to use OpenDNS.