UNLOCK AIRTEL 4G HOTSPOT E5573CS-609
1.you need to unlock the device 2.write IMEI 3.s/n number 4. MAC address Use below code to update the MAC address. Make sure you are updating your own MAC address. AT^PHYNUM=MACWLAN,7AFEE22111E4 MAC address update is important as you will find difficult to connect through cable and wifi sometimes specifically on MI and xiomi devices https://gadgetgurumelville.wordpress.com/2016/11/27/unlock-airtel-4g-hotspot-e5573cs-609/comment-page-3/