it will work with 1.0 ghz quad core in android

[stodag]

Also some processors are faster than others... A9 CPU is fastest out there bar A15.. if you can afford one then go for it, A5 being the slowest.
I would recommend A9 as its cheap but very quick but GPU is also very important so A9 combined with a desent GPU.. although when fully optimized may run full speed on older hardware.


Also to check your phone, use root explorer then proc/ CPU info.