I can't download any apps on my iPhone. And I can't update apps. My phone is lagging so bad.

Hey there,

what happened when you try to download apps ?

See ☞ If you can’t download or update apps on your iPhone or iPad - Apple Support

Everytime it says my password is wrong and I know it’s right because it said it was right when I logged in, and then I deleted the app and it said my password was right when I tried to download it again but then it said my payment information wasn’t working and I put it in and kept saying that