In my iphone 13 often i face this issue , my internet speed is good im getting 240 mbps but all the apps especially whats app keeps on saying connecting , safari keeps on loading , youtube is buffering, instagram comment box dont load ,but this issue sometimes disappears on its own after 1 week. pls help how to solve this problem permanently
hi bro, which network you are using? jio fiber by any chance?
airtel fiber 200 mbps
ok bro, I experienced this issue in my Jio fiber. do this setting changes. go to settings - wifi and tap on (i) to navigate inside connected wifi network. Then swipe down to locate Configure DNS. select manual and enter these DNS Servers.
8.8.8.8
8.8.4.4
These are google dns servers. Now check with other apps, instagram comments whether they are loading fine or not. You may restart the iPhone once if you want to and check.
now its working fine bro after changing the dns 
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