Are you looking forward to using jio join app for windows phone?
The direct answer is NO.
You can not use the app on your Windows Lumia phones manufactured by Nokia, Microsoft or HTC. The main reason because Jio Join (Jio4gOnline) is designed only for Android and iPhones.
The app for Windows phones is yet to be released.
If you find any instructions on the third party website, please ignore those as they are illegal and they may lead you to download unauthorized third party applications. Hence always reach out the official reliance jservice website for updated information.
Read: What is Reliance Jio Infocomm Official Website?
What is Jio Join App?
Jio Join App is currently known as Jio4Gonline App. It helps any Android and iPhone LTE phones to place voice calls.
As reliance jio is a 4G only network, the users with LTE phones can only use data and no voice calls. In order to address such issues and provide access to voice calls, reliance launched an application that converts any LTE phone to place voice calls.