iPhone 3GS, iOS4 and MMS not working

I ran into a problem with MMS after I upgraded to iOS4 on my iPhone 3GS. Somehow, it was impossible to send MMS messages on the KPN cellular network. Searching the Internet revealed that I wasn't the only one.

The general consensus to solve this issue was a restore of the iPhone and not to restore old settings, but start from scratch.

After doing this, MMS still couldn't be sent from the iPhone, so time to do some more research. It turned out that KPN must have change the MMS settings, since my old MMS settings weren't correct anymore. So try these settings BEFORE you restore your iPhone. It might save you a lot of work and time.

Note: the following settings are for the Dutch KPN Network, and probably won't work on other networks / carriers.

Old Settings

APN: portalmmm.nl
Username:
Password:
MMSC: http://mp.mobiel.kpn/mmsc
MMS Proxy: 10.10.100.50:5080
MMS Max Message Size: 300000

New Settings

APN: portalmmm.nl
Username: kpn
Password: kpn
MMSC: http://mp.mobiel.kpn/mmsc
MMS Proxy: 10.10.100.20:5080
MMS Max Message Size: <leave empty>

Notice the differences? Anyway, with these new settings, MMS worked again.

KPN does have a page dedicated to the iPhone (in Dutch), regarding the Internet, and MMS settings. Just check those pages for the lastest settings.

I've updated the original page on my blog with the new settings.

Member of the iPhone Club

As of today, I'm the (proud) owner of an iPhone 3Gs 32GB (Black). Ever since the release a couple of years ago I really wanted an iPhone. The problem is that we can only get an iPhone in combination with a T-Mobile plan here in Holland, and alternatives to the T-Mobile plan are relatively expensive;

• You need to cough up the entire amount for a SIMLOCK free iPhone in once (several hundreds of euros) or
• Get the T-Mobile plan and let them remove the SIMLOCK (for a fee). Initially less expensive, but you're still hooked to their two year plan.

Either way, an iPhone cost around 800 euros, whether you pay it at once or spread the costs over two years. Since I didn't like to finance T-Mobile for a plan, since I already got a pretty good deal, I went out and bought an iPhone.

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