A lot of smartphone user has a problem on connecting there device on wifi, such as "obtaining address" but i have solution for this problem. You don't need to restart your router/modem to connect your devices on WI-FI.
⭕LET'S GET START⭕

Procedure :
◻  You need to connect your phone first on wifi to be able to see the IP ADDRESS.
◻  Go to settings>about phone>status>IP address
    


◻ Go to "settings" and tap on "WI-FI settings"
  ▶Here tap or Hold your connected network and then select "Manage network settings"
  ▶ Now choice static option.
    ▶fill-in the blank
       IP address : (put here the IP address from about phone)
       Router :  192.168.xx.x ( you will find on your router)
       Prefix length : 24
       Dns 1 : 8.8.8.8
       Dns 2 : 8.8.4.4
       

You don't need to restart your router. Just click the wifi network, then BOOM! YOU HAVE SUCCESSFULLY CONNECTED 😁