I've used Windows Phone 8/8.1, Android and iOS devices extensively in the last few years. I personally like the iOS better than the other 2 ecosystems. That's why iPhone 6s Plus is currently my daily driver.
There's no harm in buying 6s now. If you can wait, iPhone 7 will be retailed by the end of September and should be available in India by October.
There's no harm in buying 6s now. If you can wait, iPhone 7 will be retailed by the end of September and should be available in India by October.