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Yes, it is possible to re-enable secure erase. All you need to do is to format the partition once again. Just make sure you select "Mac OS Extended (Journaled, Encrypted)", with any password that you will remember (just in case). Once formatted, the "Security Options" button will be available again, and you can securely wipe out the partition!


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To conserve data, you can turn off background app refresh on some of your apps (found under settings) or you can go onto everyone's phones and do the same. The feature was designed to update your Facebook, Twitter and other feeds while your not in the app. See what apps are using the most data (found under Settings > Cellular, then scroll down to Cellular ...



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