How to Solve Error 19 in Airtel's Huawei E5573s-606 Mobile Hotspot WiFi Router?

Many users facing an error 19 to unlock Airtel e5573s-606 Mobile Hotspot Wifi Router that i read in the comments of my previous Airtel's Huawei e5573s-606 Mobile Hotspot Wifi Router Post. So, here is the solution for error 19.

How to Solve Error 19 in Airtel's Huawei E5573s-606 Mobile Hotspot WiFi Router?

NOTE: 1). The Tutorial will be Send Via Email Address

Steps to Get Premium Unlock Tutorial:

• Find Your Firmware Version, Go to Your Airtel 4G Hotspot settings page (eg. 192.168.8.1) Settings >> System (From Side Tabs) >> Device Information & See the Software Version is like: v21.180.**.**.** then buy v21.180.**.**.**  OR if Software Version is v21.315.**.**.** then buy v21.315.**.**.** 
• Buy Airtel Premium Unlock Tutorial From Below Shopping Portals.

For Old Firmware (v21.180.**.**) - Rs 399

For Old Firmware (v21.315.**.**) - Rs 499

OR

Reason For Error: Error 19 may caused if the other application or service is using your modem.

Solution For Error 19:

• Error Code 19, means your modem ports is using by any application or services.
• First of all close dashboard and disconnect the internet if using same modem.
• Open Task manager.
• Click Processes
• Now Find This Three Processes
• HWDeviceService.exe
• DCService.exe
• MobileBroadband.exe ( Vodafone Mobile Broadband Service )
• UIExec.exe ( UI Assistant Service )

Right click and click Kill Process Tree for this processes Then Try Firmware Update.