Thanks for the reply. 

What will be the scenario when there is any problem on the device and i need support from Cisco. Specially Call Manager sometime behave differently when there is some bug in existing version of software?

Cisco asks serial number of the device if we call for support and if there is no smartnet then they wont even forward the case to TAC support.

Any inputs please?

Thanks.

Thanks Everyone for your replies.

There would be little point in making something 'End of Support' if you could just call up and get support.

If you want support then you need to look at upgrading the hardware to newer versions.

Cisco usually have two smartnet dates when announcing something end of life, the first one covers a new service contract and the second covers an existing contract.

You can often extend an existing service contract for several years after the EoL announcement but they usually prevent you buying a new contract much sooner.