Question: how to boost wifi connection on iphone?
Answer: Google – 8.8. 8.8; 8.8. 4.4.
OpenDNS – 208.67. 222.222; 208.67. 220.220.
Open Settings → Wi-fi.
Tap on the 'i' icon to the right of connected WiFi network's name.
Scroll down and tap on DNS.
Enter any of the given DNS addresses as is.
Restart Wi-fi on iPhone.