NTP Incorporated – co-founded by the late Thomas J Campana, who invented many of the technologies used in wireless email – has filed lawsuits against Apple, Google, HTC, LG Electronics, Microsoft and Motorola in the United States District Court for the Eastern District of Virginia. The company says eight of its patents, which relate to the wireless delivery of electronic mail, have been infringed.

NTP is probably best-known for a lengthy legal case with Research in Motion that's now been settled. The US government was forced to intervene after RIM was ordered to stop infringing the patents, which would have shut down BlackBerry email in the United States.

As usual, our weekly podcast - The Fonecast – was published this morning.

In this week’s show there’s an update on the reception problems for Apple's iPhone 4, talk about Nokia's future with Symbian and a discussion about the demise of Microsoft’s Kin and Emblaze’s First Else.

This week's look at the latest mobile industry headlines includes an update on the reception problems for Apple's iPhone 4, Nokia's future with Symbian, the end of the road for Kin and the First Else... and loads of other news stories, too.

Apple has published an 'open letter' regarding the coverage issues with its new iPhone 4. Here's the entire letter:

Dear iPhone 4 Users,

The iPhone 4 has been the most successful product launch in Apple’s history. It has been judged by reviewers around the world to be the best smartphone ever, and users have told us that they love it. So we were surprised when we read reports of reception problems, and we immediately began investigating them. Here is what we have learned.

In this week's edition of The Fonecast we discuss the reported problems surrounding the launch of the Apple iPhone 4 – and we take a look at the rest of the week's industry news, from mobile TV and roaming charges to Symbian and Android. In addition, there's a visit to Good Technology to learn more about its mobile email service.