While rare, some physical stores still accept paper checks with a valid photo ID.
Some online retailers may require a "test deposit" (small pennies) to verify your account before you can complete the purchase. buy phones with checking account
Some retailers allow you to enter your routing and account numbers during online checkout to pay via an "e-check" or bank transfer. While rare, some physical stores still accept paper
Many mobile providers allow you to set up AutoPay linked to your checking account to pay for a phone in monthly installments. Many mobile providers allow you to set up
If you'd like to find a specific or mobile carrier that supports checking account payments, I can look that up for you.
Can you make a purchase online using checking account information?
Check your bank's daily debit limit; high-end phones may exceed it, requiring a temporary limit increase from your bank.