ok, it is 1111. If anyone has the same question. BTW, the regular staff at verizon customer support center are really stupid! !! Spent 20 mins asked so many stupid questions and can't solve it. Finally, their supervisor answered the exactly same question with 2 seconds.
FYI. If you are not approved instantly then you can call 1-888-609-7805 and speak with some one in chase lending dept and they can approve your application after verifying your credit and other chase CC and send it for last stage of approval which is just a formality. Other phone number that may be useful: Chase: 800-432-3117 (App status) Chase: 888-270-2127 (App reconsider) Chase: 877-781-3109 (combining & product change) Chase: 888-245-0625 (Credit Analyst - Reconsider) Chase: 888-622-7547 (Chase Executive Ofc. in IL)