Wi-Fi problems

Hi!

Please help me solve the problem. Recently, three times in a few days there have been problems with connecting to the home Wi-Fi network: the phone sees the network, connects to it, but the pages do not load, which means that there is no Internet access. The problem is not in the router, since Wi-Fi works perfectly on all other smartphones. I have already tried everything, including resetting the network settings, but recently even this does not help much: after the reset, the smartphone again sees Wi-Fi network, but noting loads, then everything returns to normal, but after 1-2 days the problem repeats itself. Can you please tell me what to do in such a situation? Will updating IOS help to solve this problem? Or is it a manufacturing defects?