This 5.5-inch handset with a Qualcomm Snapdragon 625 under the hood and a 5,100 mAh was only available in China so far. India gets two versions via Flipkart, one with 3 GB RAM and the other with 4 GB, starting around $250 USD.
http://www.notebookcheck.net/Lenovo-P2-hits-India-via-Flipkart.191035.0.html