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Permanently deleting hidden text messages (HTC One XL)
I've been searching for a while for this, but I can only find solutions for how to recover texts; what I want is the opposite.
I'm aware that when you delete a text, it only becomes hidden in the phone's storage. I am looking for a way to remove everything, to a point where it is unrecoverable - I understand that these messages get overwritten when the memory is full, but that is likely a very long way off. I have used an app called "history eraser", which sounds encouraging but I cannot find any guarantee that it deletes hidden messages - I have attempted to use "Dr. Fone for Android" to see what is recoverable, but since the One X doesn't support USB storage mode this has proved impossible to test.
Is this enough, or is my message history still going to be available to those with the know-how?
I have started using TextSecure to encrypt future messages, but I'd like to be sure that the previous ones aren't still vulnerable.
Would appreciate any input.