[Touch Pro, Fuze ROM Development] Jdilla:
I did some searching and I couldnt find an easy fix but some info here that might help.

AT&T PhoneCanvas Dialer w/ Video Share and PTT

3G Service Area:

You (and the other party) MUST be in a 3g service area, with at least 2 bars, why 2 bars you ask? well, quality of service mainly, less than 2 bars and your 3G will be very slow, remember you're trying to transmit alot of data with Video share.

A Data Plan:

This was a shock, but not really... if you don't want to be charged for every KB of data sent / received in addition to the 35 cents per minute pay per use or whichever plan you have, you must have a good data plan to cover the charges... I don't understand why AT&T feels they must double charge, once for the feature and then for the data to use that feature, MMS Messages do the same... if they charge a high rate for MMS, you shouldnt be charged for the associated DATA, what a rip!

Video Share PPU, Starter, or Premium service (the service itself) -- not much to say but DUH, also the receiver must have this service and an appropriate data plan as mentioned above or you will never see the option on your phone during a call.

IMS APN Feature:

(FREE) Although the guy I finally got a hold of to make this all work (who had a thick accent and was hard to understand, but knew what he was doing) told me that video share will work with wap.cingular, there have been reports that it doesn't. When you provision Video share the network automatically changes your APN to ims.cingular, IMS APN feature must be on your account for access or it could give you all sorts of problems form "forbidden" on browsing to rejected emails/mms. If you have a 3G phone this is most likely on your account, it is the new higher speed apn for 3G, maybe that's why the internal customer service code for it is "3GMM" hmm....

Correct settings in your phone:

I'm not going to go into those details here, but its obvious, you must have the correct settings.

Correct IMEI:

Here's the fun one, I had tried everything above as mentioned in scattered posts throughout the net only to call at&t several times getting frustrated over not getting any results, the final time I called them I ended up talking to some guy in a "special department" related to video share issues. After reviewing all settings on my account he finally figured out the problem (which took him about 2 minutes after getting transfered) the IMEI numbers for my phones were not listed in the system. (blame the dealer I bought the phones from as they are supposed to enter this) there are several places the IMEI's get listed, and I'd think they could easily pluck this information from the network when the phone registers but no, I read him my IMEI information from both lines on my account that video share didn't work for (the FUZE and the VU), he had us remove the batteries as he sent the updates across the network, and BAM the very next call between the phones and video share works like a champ. What this boiled down to is the network didn't know what type of phone I had and what features to turn on and what to do to make the phones talk to each other in a compatible form. I'd think this would cause all sorts of other issues with the network too, not just for video share.

A final note on this:

If you change phones, make sure you call and have the IMEI information updated, if I change my FUZE for another FUZE it would probably work, but if I swap the device out for a different model it would not necessarily pick the most compatible features for my phone...

Privisioned Dates:

When you go to your online account management and add features, it says they are immediately effective, sometimes this is true, but in the case of my account it likes to post-date to the next bill cycle. This is especially true when you visit an AT&T store, it will definitely post-date there. I had 3 IMS APN features and Video Share features on my account, all with different dates, this is because, I tried to add and 2 people at the store tried to add, to make sure Video Share and IMS are on your account and active / effective TODAY you have no choice but to call customer service and tell them you want them on your account effective immediately. While it will appear on your account management that you have it, don't trust it as it only checks for the feature, not the active dates.

And finally the internet connection:

Some people have noted that your connection must be active before the call, this is not true although it is very helpful. The video share negotiation takes place over the phone control channel, when it is determined that you both have the service and compatible phones it will send a message to both phones. They will then try to turn on their data connections and verify with the server whether or not the option should be turned on. If your data is active before the call your video share button will be available instantly as it is for me. If it is NOT then it will take ~20 seconds or more to connect to the net and contact the server to verify, then turn on the option for you. Just make sure your internet works in general and that you can connect and you should have no problems during a normal call.