[T-Mobile myTouch 4G Slide] MT4GS:
Just heads-up: actually THIS Nokia CA-75U CABLE IS A NO GO.

I have this cable, it was for my Nokia N97, so I found it today and tried: it does NOT work with my MT4GS. All I can see is very distorted/flickering picture.

Interestingly though, with this cable any of the wires (white, red and yellow) when connected to yellow connector on tv will give out this same flickering picture.

THIS CABLE DOES NOT WORK

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Since I had bunch of a/v RCA cables from my old gear, I tested them all one by one.

I found out that for as long as they have 4-prong 3.5mm plug almost every one of them will work (some of them need to be swapped, i.e. yellow with red, but most worked exactly as color-labeled).

Any 3-prong 3.5mm plug "mono" tv-out cables are always detected as "audio" (even though they have white and yellow connectors) with one exception: a 3-prong 3.5mm tv-out RCA cable from one of my old Canon PowerShot cameras (not sure for which model tho, I think it was A480), with a black (mono audio) and yellow (video) RCA connectors kinda works too: video is there, but there is no sound at all (just buzz).

These are the cables I can confirm working:

(all of them are 4-prong 3.5mm plug with white/yellow/red RCA connectors)

- BEST: cable for JVC GR-D750 DV camera

(best because creates no distortion on tv when rotating the plug in the phone's socket, while all other get some distortion when moving the phone or rotating the plug in the phone)

- other JVC and Canon DV camera cables (have 3 of them, all work but 2 of them I had to swap colors)

- Sony DV camera cable

all of them look similar or exactly like this one

These three cables I can confirm NOT working:

- Fuji FinePix S7000 cable

- Canon PowerShot "mono" cable (came with model A480 or G10)

- Nokia N97 tv-out cable CA-75U

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TV-OUT

Picture is 4x3 in portrait mode and 16x9 in a landscape mode.

Note: my TV (plasma LG brand) had to be set manually to "16:9" or "Just Scan" because when I kept it on automatic detection it stayed at 4:3 even when I rotated the phone into landscape, so I'm sure this may happen on other TVs too. I guess the analog tv output on our phones doesn't send any "flag" or "info" to TV about video's aspect ratio.

(Sony cable)

with TV's all enhancements turned on (boost black, filters etc) it is actually OK:

(JVC cable)

yes, my phone's screen appears slightly soft because of matte anti-glare screen protector

(forgot which cable it was when I took this picture)

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Movie playback

I had no problem playing downloaded XViD-encoded AVI files using the built-in player (stock ROM 1.63), as well as any 1920x1080 HD videos I took with this phone.

(and no, I didn't experience any problems as described earlier in few posts - could it be due to newer stock ROM version?)

But even though the picture quality is acceptable, of course it is NOT HD quality since it is scaled-down to 720x480 through the analog RCA connector.

Another thing I found out is that the "built-in stock player" doesn't support external subtitles.

So I downloaded Mobo Player which supposedly does support SRT text subtitles.

However, as seen above, when using hardware decoding, Mobo Player does NOT output the subtitles to tv! Subtitles are layered only on the phone's screen.

When I changed Mobo Player's playback settings to software decoding, the subtitles appeared on tv too, but there is a drawback to software decoding: the picture quality is visibly worse than using hardware decoding (unless it has to be set up somewhere in the settings? Like XViD codec's options on a computer?):

which really surprised me, because MT4GS has dual core processor powerful way-more-than-enough to beautifuly decode any standard-resolution XViD picturtes, so what gives?

I read somewhere that "Mobo Player Codec for ARM V7_VFPV3" supposed to help on MT4GS, so I installed it - but I didn't notice any difference.

Film's picture quality is still so-so, all boxy with jaggedy edges and basically unacceptable...

I have only plasma TVs so I couldn't test it with any old style "tube" TV, but I'm pretty sure the picture quality on those must be comparable to what I see on plasma and probably as good as professional DVDs playback on "standard TV" (since it is the same resolution).

On LCD TVs you probably get similar upscaling resolution as on plasma, just less black and lesser color palette of course (than plasma or old "tube").