hello. My GF has a iphone 4. When given a replacement at the apple store, she was given new one with ios 7.. Since then.. oh my Gosh. Bad response times constant freezing, lagging etc. Then last night.. she was texting a few of her friends and the phone became unusable. It was lagging hard. So she hard reset it to find that all her Text messages are gone! First the list still existed in messages, but when she selected the no named conversation it was empty. She wants them back! i tried using "wondershares, Dr. fone" to get them back but no go! The phones running ios 7.0.4. Yes i know that aparantly 7.1 has performance upgrades. she didnt have the required space to install it. So now what? she texted me all about the issue and when i took a lot at it i got her using her old phone so she doesnt overwrite any of the data.. in Settings>general>usage. it says her texts are 300 something megabytes.. she only has a few texts she sent out. Are the old ones still there and how do i retrieve them back on her phone? Let me know thanks..