Xbox Live error code 80072ef3 is an error that usually occurs when attempting to sign in to Xbox Live on your Xbox 360 console. The error may indicate that there is a network connection issue, a corrupted data on the hard drive of your device, or even an unpaid balance with the subscription.
You may see an error message "Can't sign on to Xbox Live."
Some of the solutions to this error include:
Please see our in-depth walk-through solutions below.
Solution 1. Clear the cache
Before applying any solution, please check your account if you have a pending balance. Please pay it if you have, because according to Microsoft, "If you have a payment option tied to a subscription that has an outstanding balance, you'll have to settle the balance owed before you can make a purchase on your Xbox console."
Xbox error code 80072ef3 appears in both Xbox live and Xbox 360, the cause of this problem is due to cache, corrupt data, and network problem. There are two ways to clear the cache. First, hard press the power button and let the console power down for at least 3 minutes. Second, Go to Settings Tab >>System Settings >> Select Storage, clear the cache of the all storage device.