Doston aaj kal bot si app hein jahan aap apne contact number save ker saktey hein. Or ager aap ka mobile kharab ho jaey to aap apne tamam contact wahan se wapis le saktey hein mujhey koi app bataien or kis tarh contact app mien save honge or phir dobara mujhey kese mileinge tafseel se batien? please