Nokia had promised that it would release an update to fix connectivity errors that prevented the Lumia 900 from communicating with cellular networks. Now, the company has announced that the software patch is available three days earlier than expected.

The software update can be applied with the Zune software on a PC or the Windows Phone 7 Connector for Mac and those programs can be downloaded from Nokia’s site here.

Customers who had purchased a Lumia 900 on launch day or shortly thereafter had noticed that there were instances where the device would suddenly lose connection with the cellular network. Nokia jumped on the issue and said that a fix would be available by next Monday.

Screen Shot 2012 04 13 at 4.35.26 PM 520x248 Fix for Nokia Lumia 900 connectivity error available three days early via software update

Now, the company has delivered the fix, which it says is related to software, not hardware.

In short, a memory management issue was discovered that could, in some cases, lead to loss of data connectivity. This issue is purely in the phone software, and is not related to either phone hardware or the network itself. As a proactive and prudent measure, we decided to take immediate action. We have identified the issue, and have developed a solution.

For those that would feel more comfortable swapping the device out, Nokia has provided that as an option. In addition, customers who purchased, or will purchase, the device before April 21st will receive a $100 credit on the device, making its cost effectively zero for subsidized purchasers.

All-in-all, Nokia seems to have done more than its level best in fixing the issue promptly and offering monetary compensation as well. A fairly textbook example of great customer service that should help to set the tone of its foray into the U.S.. Our own Alex Wilhelm went hands-on with the device and found it to be a worthy entry into the US market for Windows Phone.