Nokia PC Suite 6.7 does support Nokia 3100. Is the DKU-5 cable you are using original Nokia cable or some copy product. There are plenty of sad stories where one has purchased copy DKU-5 cable and it...

Nokia 3595 supports only over-the-air connectivity and therefore has no local connectivity medias supported (IrDA, BT, USB,...). In practise this means that you are not able to send AT commands...

It is Software Development Kit. You are not supposed to ship the SDK as such but your own application which has been developed using the SDK.

Are you sure you are checking the Unread messages <stat> and your message storage <mem1> is correct?
You could also use PC Connectivity SDK for this...

Okay. At least with this you can proceed http://www.forum.nokia.com/main/0,6566,034-981,00.html. Actually in this case Nokia PC Suite will act as a mediator between your PC application and device....

Ask the SMSC number from you operator.

This is for sure a device software problem.

You can get the SCA from you operator but I have somehow feeling that you really don't need (in reality) that since usually the messages are sent to the SMSC on that served network (might be even...

I would quess that MMS functionality was not really major thing when the SDK was designed.
Here is one solution but very much device dependent:
http://europe.nokia.com/nokia/0,8764,75921,00.html

Perhaps the free memory reported by the device is not the memory you can directly modify but it is reserved (but displayed as free) for your messaging etc. applications. E.g. that you have still...

I think there are no Nokia supported ways for local connectivity with this device. See http://www.europe.nokia.com/nokia/0,8764,75916,00.html

1. there appears not to be extensive list for AT commands per each device available. Make a search about AT to Forum Nokia and you'll find the latest AT command Guide for Nokia devices
2. As being...

Okay, I propose you uninstall all the stuff you have installed (check also Control Panel about existing sw) and upload the latest PC Suite 6.7 from Nokia.com. The cable driver (the latest version)...

There are plenty of these stories seen where DKU-5 copy product does not work but the original does, so...

What kind of communication you want to do? What handset? Both PC Connectivity SDK 3.0 and PC Suite Connectivity API does communicate over USB.

There are no licensing fee for the SDK. There are plenty of examples for SMS management available in this forum and SDK documentation.
Whether AT commands or the SDK is more feasible dependens...

Please check:
ms-help://MS.MSDNQTR.2005JAN.1033/dncscol/html/csharp09192002.htm
and
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dncscol/html/csharp09192002.asp

I found my old Nokia 6310i and tried it just for fun with 6.7 PC Suite and it does work with some applications (like Backup). I have XP and MS BT stack in there. The SDK 3.0 works for sure with Nokia...

I believe there is no means for local connectivity (USB, IrDA, BT) with this device and therefore it is a bit hard to send any AT commands to it.

I don't quite know if playback messages can be developed with this since for having the playback functionality you would actually need some sort of IVR functionality. In this case you would need to...

Hey, I don't have "i" model so...

What Nokia PC Suite application you are using for this "sending" operation?

PC Connectivity SDK 3.0 supports only Series 40 devices. With some really new Series 40 devices there appears to be incompliancy e.g. in area of SMS support. Nokia PC Connectivity API 1.1 has the...

At least my wife's 6610 works with applications created with PC Connectivity SDK 3.0. I would assume that 'i' model works just fine.

Nokia 6600 is S60 2nd Edition device but doesn't include the required Feature Pack. So, it is not a false notice.