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# I changed my smartphone. Do I need to re-register for ST Pay?



**No need to re-register!** Here's what happens when you log in to ST Pay from a new device with your existing ST Pay account:

* **Verification Needed:**   If the SIM card in your new smartphone is the same one registered with your ST Pay account, you'll receive a one-time password (OTP) on that number.

* **SIM Card Mismatch:**  If the SIM card is not on the new device, you may not be able to complete the verification process. Please insert SIM you register your ST Pay account with. 


* **Successful Verification:** Once you successfully verify the OTP, you will be able to use your ST Pay account on your new device.

**Now you can access your ST Pay account from your new smartphone!**




**Important Note:**  For a smooth login experience, it's best to use the same SIM card associated with your ST Pay account when switching to a new smartphone.