Quote:
“ one called THL T6C, only goes for £39.99, but not really trust its quality,”
I've had a Chinese made Cubot GT99 now for the best part of Three years, it pretty much runs 24/7 both as a phone and a permanent wifi hotspot during the evenings and weekends (I don't have landline / ADSL at home) so as far as a harsh life goes, its probably had more of that than most phones, branded included - i.e on charge from Fri Evening to Monday morning whilst constantly being the only source of household internet, as well as normal daily phone activities, car diagnostics, GPS, streaming, audio books etc
I really can't fault it, its never overheated, required a factory reset or let me down and its still on its original factory components (Screen, battery etc) - I just wish my car was as reliable

I can't speak for all Chinese phones, I can only relay my own positive experience from owning one for a period of time, and mine has been very reliable, in fact just as reliable as one costing five times the price, and I wouldn't hesitate to have the same brand again when I eventually upgrade it to a 4G LTE model.
It was around £90 when I bought it direct from a vendor on the Chinese site - Aliexpress, but they do a GT72+ model which is slightly cheaper, and they are listed on Ebay -e.g
http://www.ebay.co.uk/itm/CUBOT-GT72...-/181911007145