Why can't my phone install new custom ROMs?

[AC Question]

why my phone can't install new custom ROMs

I'm using lenovo A660. recently i accidently delete my contact phone android which is already provided at the first time i using this. so i think maybe i can got it back if i install new custom ROMs.unfortunataly my phone can't install the new ROMs. it failed. it show as below…
– Install/sdcard …
E:signature verification failed
Signature verification failed
Installation aborted

I hope this forum could help me as this is the best forum my friends told me.PLEASE

 

[srkmagnus]

Re: why my phone can't install new custom ROMs

I'm using lenovo A660. recently i accidently delete my contact phone android which is already provided at the first time i using this. so i think maybe i can got it back if i install new custom ROMs.unfortunataly my phone can't install the new ROMs. it failed. it show as below…
– Install/sdcard …
E:signature verification failed
Signature verification failed
Installation aborted

I hope this forum could help me as this is the best forum my friends told me.PLEASE

Is your device rooted? If it is, then make sure the ROM is for your device and is properly signed to be flashed.