Evidences required to prove wife is cheating in a divorce case

Those would be a good piece of evidence. Infact you can file for divorce on the ground of adultery even if you don't have these evidences also but you are aware of the fact that your wife is cheating on you and adultery can be proved via arguments and cross examination.

We need messeges and the phone should be sent to FSL for authetication of the evidence. We can use this as a proof of cruelty by wife. But if you are thinking to prove adultry then it is very tough to prove adultry . Yes but as a cruelty by wife you can use it.

Yes obviously you can file divorce under the ground of adultery and right now courts also considering electric proofs as the valid proof and sms and email conversations also can be considered to proove emotional attachement with another guy so yes u can get divorce from cheater wife