How do I change my phone number for text alerts?
To update a phone number or change any other SMS marketing preferences:
1. Sign into your account and go to your account overview
2. Under your details, click marketing preferences
3. Scroll down to text alerts.
4. To make changes or opt-out, click the edit button.
For further information see terms and conditions on marksandspencer.com. © 2017 Marks and Spencer plc