Text messages may not last forever, but they are harder to dispose of than you might think. Yes, they can vanish by any number of means, including mistaken deletion, a faulty iOS upgrade, a jailbreak failure, or another unfortunate circumstance. Regardless of how they were lost, though, you can restore missing text messages to your iPhone — at least sometimes.How? Your iPhone saves all text message, MMS, and iMessage data in an SQLite database — an open-source, back-end utility built into all mobile phones (and most computers) and bundled into many popular apps. This function operates in the background without you having to control it.When you delete a message, the new space gets transformed from allocated to unallocated, while the message data remains intact. Eventually, it will be overwr