How reliable is the iphone4 of Ruigang International 1380 yuan? It's better for the buyer to tell me.

Hello: This is a Taishan Zhai machine, the best Android machine in the cottage at present, but it looks like an Apple IV and is cheap. Many people buy it, but because it is not made by a big factory, the quality is not guaranteed and the machine is not optimized. Purchase is not recommended. The highest price of Apple IV is 4399 now. I hope I can help you.