how to update last 8.1 OS in lumia 730.?

[Windows Central Question]

i had downgraded windows 10 to 8.1 but it seems that my phone is not at last version of 8.1 OS so can you tell me how to update last version of 8.1 OS through phone,,,..

 

[libra89]

Back up your phone first.

Go to Settings, scroll down to "phone update" and tap "check for updates". If you have updates, you will be able to tap install to install them.