I took my phone there for repair. It's a repair shop.
I dont know if they sell used. I took my LG cell with a crack case to them. I am so happy with the service I got and the phone looks bramd new.
Good advice!.
I don't work there. I just brought my ZTE Blade Zmax to get the cracked screen and frame replaced but afterwards, the charging was failing and found out that even though they didn't replace it right. My close friend recommended that not to get your cellphone fix since you'll spend more money than buying a new phone which I did.
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