I received the following email:
From: no-reply@t-mobile.com
Subject: Your T-Mobile Account has been updated
T-Mobile Notification: Subscriber Modified
Dear Customer,
Subscriber has been modified for device # . The msisdn has been changed from # to # xxxxxxxx .
Sincerely,
T-Mobile Customer Service
where xxxxxxxxxx is a phone number. I recognized the phone number as being for a SIM that I had used in an Android tablet. When I stopped using the tablet over 5 years ago, I also discontinued the phone line and removed it from my T-Mobile account. I just looked at my T-Mobile account now and it doesn’t show this number. Why did I receive this email and what does it mean?