Android mobile Old Samsung Galaxy A40 can not connect internet now

Question

Android mobile Old Samsung Galaxy A40 can not connect internet now.

Android mobile Old Samsung Galaxy A40 mainly used as clock wake

After install Defender and used antivirus VPN, long time power on,

discover smart view app which blue tooth enabled itself, and need to force stop and clear cache several times to stop it, every day need to keep this steps.

previously can use VPN online, but recent weeks it can not connect internet with VPN.

Suspected need restart mobile phone.

before can not connect internet, I just reset Microsoft launcher and sign in with my Microsoft account to Microsoft launcher in this mobile phone. only Launcher and Defender signed with my Microsoft account.

copilot can not connect since internet is off though wifi is on

this google account has enabled external security key

but open google store require it to give pass key. then I did not give pass key since not have NFC