Dominican phone numbers never work for verification codes with PayPal, even for Dominican based PayPal accounts. Even if you can add the number, the text message with the code never arrives. I have a Dominican based PayPal account, and I have a US based T-Mobile number linked to it, so I can receive any text from PayPal here in DR, if needed. I have Authenticator app as a primary verification option, but the phone number is a secondary option, and in some cases they may ask for verification via text even if you use Authenticator app.Just so all understand . My Paypal account works fine. I can log in, receive money sent by others, pay Amazon, Pedidoya and other things without problem. I can use my Paypal debit card and check balances. The only thing I am recently having issues with is adding money to Paypal from my bank. It asked for my phone number to send a validation confirmation code. Says my phone number is invalid and I cannot complete the transaction. It used to let me get email validation code but not now. . I reconnected my bank to Paypal so when I go beyond my pp balance it will take money out of my bank until I get this fixed.
If you are in DR and you don't have any US number for verification purposes, you can buy a prepaid T-Mobile Sim Card online, ship it here via any courier, and when it arrives you activate it here in DR (it's possible) and use it in roaming here. You can always top up via any online prepaid phone recharge. I have a couple of prepaid US numbers just for receiving verification SMS, it costs me about 3 USD per month to keep each number alive, and not just for PayPal but for any other service that requires US phone number.