if you've got an old phone at the back of a drawer that could also be repurposed, that way if it is ever found then no suspicions will be raised.
Best system I have found is set up a punting phone with punting sim, and a new punting email address, that way you can keep your secret life totally seperate. Just make sure never to call your own phone, or log into facebook or any other app with your real details from your punting phone.
I have a punting email, punting phone, also got a 2nd hand smart phone from CEX so I have a punting whatsapp and kik, all accounts seperate from my real life accounts, very important not to have any overlap.
My current punting phone is a nokia C200, so cheap that i wouldnt care if I lost it or got pick pocketed on a punt