How to fix an iPhone 8 that won’t connect to one wifi only (work wifi)

The so-called Airplane mode trick is another easy old hack that has assisted many iPhone users who have encountered various forms of cellular connectivity troubles. If you want to try your hand at this adjustment, here's how to accomplish it:

1. Navigate to the Settings-> Airplane Mode menu.
2. Then, turn on the Airplane Mode option. This turns off the phone's wireless radios.
3. Reboot/soft reset your iPhone while it is in Airplane Mode.
4. Return to the Settings-> Airplane Mode menu.
5. Toggle the Airplane Mode switch again to turn it off.