If you are an postpaid subscriber call 211 and request for PUK retrieval. for prepaid check your simbed at the back.
hope it will works:)
Sorry to know that. Since you've mentioned that you no longer have the SIM tray with you, you can proceed to the nearest Globe Store and request for a SIM replacement with the same number. Just bring the actual blocked SIM and 1 valid I.D.
Hope this helps.