There is the latest rom of A5 for you, and anyone in need can download via the following links.
But before you download , please finished reading the following guides.
1) Check the software verison number in the device, if the version date is before May 3rd, then download the following one :https://mega.nz/#!3t9RQRyZ!PJb3YPreGL6f ... 4AfwbH5Vlg
2) Otherwise, this one below will be suitable for yours:https://mega.nz/#!v8sVAQLY!TnRgieY3rYSl ... Hc0xnW2HNY
And the check is very important, it can help you avoid flashing a wrong version rom, which may cause the improper work of your smartphone.