Verified on 4 Nov 2017. Oxigen Wallet is Offering Rs 300 Recharge for Free. Enter a NRI Mobile Number with country code and invite your loved ones living abroad to use Oxigen’s global service to get your recharge now.You can invite up to 3 NRI friends to get Rs 100 recharge per friend. This is only valid for Oxigen Wallet users in India who refer friends living abroad. Your NRI friend will get a link on SMS to send a Rs 100 recharge to your mobile number. Your friend will have to checkout with in 30 minutes of adding item in the cart else it will expire. applicable on Oxigen Wallet Android, Windows or iOS app. Invite Now.