My ICloud password is rest already but when ever I try download something it will show me incorrect password and I knows the password but still yet it won’t do

See this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

➛ is no service, see this Apple article: If you see No Service or Searching on your iPhone or iPad

If you see No Service or Searching on your iPhone or iPad - Apple Support

Low Power Mode is On.

Charge the iPhone & wait until the battery is fully charged (100%).

The Low Power Mode will turned off automatically.