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208 posts

Master Geek

Topic # 26172 14-Sep-2008 16:33
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I'm looking at gzip compression through Vodafone New Zealand APNs.

In the past I used which _did_ pass compressed data to my phone.
This does not appear to be the case any more.
Vodafone suggests that is no longer a widely used APN.

In the past I did a test on compressed HTML web pages and found I could compress a page by 50% as seen on my Mobile phone..
The mobile phone would then decompress the zgip data and display the web page.

I verified this using the data counter on the mobile phone.

In testing  today I have tried:

I did ring Vodafone and they were very helpful and suggested Internet or would be the APN I was looking for however it didn't work for me.
They'll also text me if they find another that could work.

I won't spell it out but there are advantages to having gzip compressed data sent directly to the mobile phone over 3G.

Now... considering all the above. I still have a nagging feeling I might have missed something and it could be a configuration error on my behalf.
If someone else uses compressed data direct to a mobile device via 3G/GSM I'd be interested to know if it's work for you and which Vodafone APN you're using.

Thank you for any info or help.

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Uber Geek
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  Reply # 164351 14-Sep-2008 16:38
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Internet is the APN that is not optimized

61 posts

Master Geek

  Reply # 164392 14-Sep-2008 20:41
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As long as you avoid the Optimiser, which does who knows what to gzipped traffic, no other component will really care about what you chuck down the pipe.

Indeed I suspect the Optimiser might actually gzip traffic that isn't gzipped if your handset indicates it can support it (If I were designing an "optimiser" then I'd do that as it seems like sensible optimisation).

So, I think something might be flawed in your testing as gzipping shouldn't vary.

Regarding APN's

The following do not get optimised:


The following only gets optimised if you're on 2G:  (I think web is the same as www) (does this exist? if it does it must resolve to www)

The following always get optimised: (this gets explicity proxied, so not necessarily optimised but could be altered unexpectedly)


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  Reply # 164399 14-Sep-2008 21:16
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Does Vodafone's optimiser software still exist/work? This was available a few years ago and used to connect to the proxy allowing you to configure the level of optimisation.

208 posts

Master Geek

  Reply # 164413 14-Sep-2008 23:43
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Compression works on browsers  like IE, Opera, Firefox etc..

But I'll workshop it a bit and see what happens.
Odd that it did work on my mobile using a month ago and now it doesn't.

However I hear what you're saying and I'd say the same.. it's just odd.
Guess I could link my laptop via my mobile using one of the APN and thus verify it on a browser which has more diag. tools than a mobile browser.

Thanks for the replies.

208 posts

Master Geek

Reply # 164482 15-Sep-2008 11:42
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Quick update.

I've created a whole sub-domain dedicated to compression.
This excludes any complications from other code.

Initially it appears that compression _DOES_ work through the Internet APN using a mobile phone with NetFront 3.3

I'm going to work through this whole compression thing and create a dynamic XHTML-MP web page that will display the findings on a mobile phone.

If I get it competed in time I'll update this post with the finding and a URL that will allow you to check if your mobile phone supports compression.

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