Though early units might have been less reliable on the inside than later ones and sequels, the original 2007 iPhone was built pretty tough—enough that a family member’s hand-me-down that has been continually used (inside cases) for nearly three years now is still working fine. At least, it was until a week or two ago, when a certain little “nag screen” became way more naggy than normal. Even when the phone wasn’t actively…
