Various iPhone models may exhibit extremely slow data throughput when connected to Wi-Fi networks. This can result in sluggish loading of web pages, YouTube content and more.
This problem can often be solved by simply changing DNS servers. On your iPhone, while connected to a Wi-Fi network, follow these steps:
- Go to Settings > Wi-Fi
- Tap the blue arrow next to the currently connected Wi-Fi network
- Tap DNS, then delete the current entries and enter the following: 184.108.40.206, 220.127.116.11 (or you can try Google’s public DNS servers: 18.104.22.168, 22.214.171.124)
- Tap return