As part of today's April 9 Patch Tuesday, Microsoft is rolling out more firmware updates to its Surface RT and Surface Pro tablet/PC hybrids.

The April cumulative update for Surface RT focuses almost entirely on Wi-Fi, according to Microsoft's Surface RT Update History page.

Fixes include:
•Certain “Limited” connectivity issues resolved
•Improves Wi-Fi to handle a wide range of access points
•Resolves system crashes caused by certain Wi-Fi issues

The April firmware update is the fifth Surface RT cumulative update the company has made since Microsoft launched the Surface RT in the U.S. and Canada in late October 2012. A number of Surface RT users have been complaining for months that they've had problems connecting to Wi-Fi with their devices. (I, fortunately, have not been among them.) Four of the five firmware updates Microsoft has made to the Surface RT include Wi-Fi connectivity fixes.

The April 9 cumulative update for Surface Pro includes other fixes and driver updates. The full list (from the Microsoft Update page for Pro):

•Resolves an issue with on screen touch navigation in the UEFI boot menu
•Resolves some Surface Type and Touch cover connectivity issues
•Support for 106/109 keyboards on North American Surface devices
•Resolves an issue where toggling airplane mode would disable the Wi-Fi driver

Read more at source:
Microsoft to roll out April firmware updates for Surface RT and Pro | ZDNet