Even though Uninor and Reliance GSM networks assures that the users can avail voice mail box number facility , they does not share any official voice mail box number. So, you can ensure whether there is availability of voice mail facility in your network by calling toll free helpline number 198 Only few mobile networks like Airtel, Vodafone, BSNL has voice mail option for free. By enabling voice mail option, the caller can leave you a small voice message for about 60 seconds , when your phone is switched off , not reachable, or busy with other calls. Call Forwarding: So, if you don’t have voice mail box option in your mobile network, then you can have other option called call forwarding. If you activate call forwarding, then the call will be redirected to other emergency number that you feed in the settings under certain conditions like phone switch off, not reachable and busy. To enable or disable call forwarding in your mobile phone, view this pr...