I'm also eligible for an upgrade but I don't think I'm ready to say goodbye to unlimited data just yet, plus I've been so out of the loop I have no idea what the current flagship devices are.
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I have a couple hardware issues with my device, the power button will trigger itself and awake my device or open a reboot menu out of nowhere and now no right speakers will work when using the headphone jack (earbuds, aux cables, etc.). I really don't want to trade it for a refurbished S3 with a locked bootloader but these issues might force me to. Should I just run this thing until the wheels fall off or take the replacement?