Will the Sprint S5 work properly on ATT?

I have searched and not really getting a clear cut answer on this question. i have an option to buy a Sprint S5 cheap, but need to be able to use it on ATT.

I haven't been able to clearly find whether this is possible, and whether it should work to the full capabilities of the ATT network.

Any help wold be appreciated before i go and purchase this phone.

Thanks!!