Instruct: Classify Amazon reviews into positive or negative sentiment
Query: phone does not work while charging

I was surprised to even find a charger for my older model LG chocolate KG800. The shipping was more than the charger, and while the price was great, this charger was not. My phone did strange things while charging, for example when dialing number '8' it would display a '3' or maybe a '6'. It did indicate that the phone was charging, but I don't trust it properly charge the phone.