text: Use the Find My iPhone feature on an iPhone or the Find My Phone app on Android phones when you suspect your phone may have been cloned to locate the phone. If there's a duplicate phone out there, you'll see it. Reach out to your carrier and explain the situation to see what it can do to shut the other instance of your number down. Only your cellular provider can resolve this problem.To keep your phone safe in the first place or going forward after your provider fixes the problem, safeguard your IMEI as you would other sensitive numbers. Someone may have been able to clone your phone because you input the IMEI information somewhere online, perhaps in an area you thought was secure. Be careful when clicking on links in emails. If you're directed to input your IMEI, go directly to your wireless provider and provide it there, rather than trusting that the link you clicked is legit.