Absolutely.  There are a number of ways.  Basically after you set up whatever solution, just make sure it never touches a network again.

Few examples: 

https://airgap.it

https://www.reddit.com/r/Bitcoin/comments/zudpbo/using_old_phone_as_cold_wallet/

https://www.reddit.com/r/bluewallet/comments/kr2ydq/how_do_i_sign_a_psbt_using_bluewallet_on_my_cold/

Doo_Deux

I have smart phone which is no longer in use, cause of low ram 2gb in it, but working fine, i want to turn it to bitcoin hard ware wallet.

bitcoin

I have smart phone which is no longer in use, cause of low ram 2gb in it, but working fine, i want to turn it to bitcoin hard ware wallet.

Possible?
