I just got my phone back from service centre after 6 months. And now my phone is frequently restarting on its own. I feel like using words thats usually replaced by stars, Im soo obsessed right now.
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I'm sorry it wasn't successfully repaired when you got it back from service but you have to return it or we can't fix it. Maybe they can prioritize your device for a speedier repair if you talk to your service center.