Sub Standard Product

Hi. I own 2 Acer cell phones. both Z500 on both I have the same issue . if I let the phones battery die MAN a nightmare starts. I can not simply switch and use after charging. the apps will not work , even the built in apps. I maybe lucky after 5-7 attempt of on and offs. the only way to get around it is to unmounts my sim cards, then switch on. this product should be taken off the market. the reduced price is still too much. I have another review on the way to prove my point.