Hi rikshi,   Thanks for posting.  Apologies that your system is not performing as expected.   Here is information you may find helpful:  How to install Dell Mobile Connect app on any Windows 10 device Dell Mobile Connect Driver   If you still require assistance and the system is under warranty, you may contact me privately. Be sure to include your personal information (name, address, telephone, email) and your computer's service tag number in your message. Thanks.   If there is no warranty, then you could contact our Out of Warranty team to get a quote for a paid service request. 
I have been using the Dell Mobile Connect app for some time now (one of the reasons I chose Dell over others). A dead SSD and motherboard with subsequent replacements meant I had lost everything, including my Mobile Connect app. Now, while I can install the drivers, I cant install the App from Microsoft Store. It claims my device is not compatible. I am using a XPS 15 2 in 1 9575. 
Unable to install Dell Mobile Connect