help me in the error of certificate of c5

[Fasehab]

kia ap bta skty hen k c5 par mostly apps par error q hota hy?kia inko thek kia ja skta hy.agr hy to plz give me method

[SJS.]

kia ap bta skty hen k c5 par mostly apps par error q hota hy?kia inko thek kia ja skta hy.agr hy to plz give me method

bhai c5 per nahi balky her symbain main ye problem hai is ki waja ye hai k ye buhat old mobiles hain in k certifcate expire ho jaty hain is liye error dete hain in ka ek hi hal hai apna mobile hack karo.
http://www.itdunya.com/t284331/
http://www.itdunya.com/t303664/
http://www.itdunya.com/t377579/