I have a unlocked version of iphone i have been able to use safari and other features over EDGE network but when i try to connect to Youtube it says "cannot connect to Youtube

Make sure you are connected to the internet. Go to Settings>General>Network>Enable Cellular data (for iPhone) For iPod Touch, make sure you are connected to an operational WiFi network. You can do this by just going to the Safari application for example and doing a google search to check and see if you have a usable connection. If these do not work, quit the running apps by double clicking the home button then holding down an icon at the bottom of the screen then exiting out of the apps one by one. If this does not work, restart your iPhone or iPod Touch (it is okay to restart because the jailbreak on iOS 4.2.1 is untethered, meaning you can turn off your device without having to re-jailbreak) Try to open youtube when the device turns back on. If this does not work, go to Safari and search "youtube mobile" and click on the first link. This will direct you to the browser version of YouTube. Once on that page, tap the + button at the bottom to add this page/link to your home screen. It will function like the regular YouTube app, and in my opinion, its faster.

The iPhone can connect to the internet through both Wi-Fi and EDGE. Wi-Fi would be the wireless network at your home or business. When the iPhone connects to the internet through EDGE, it is actually connecting through the AT&T phone connection (or any other service provider the iPhone works with in the future).
To the connect to the internet, you simply need to open up Safari (which is the internet browser used by the iPhone). If you're used to using a pc, think of Safari as the 'Internet Explorer' that the iPhone uses. You can use Safari the same way you could use Internet Explorer.
Once you open up Safari, the iPhone will attempt to connect to the internet. If there are wireless networks available wherever you happen to be, the iPhone will prompt you to choose one to connect to. If you're trying to connect to a network that has security, you will be prompted to enter the password for the network.
If you want to check to see whether there is a wireless network available where you live, work, or play, go to 'Settings' and then 'Wi-Fi'. The iPhone will show you all of the wireless networks that are available.
If there aren't any wireless networks to connect to, iPhone will connect to the internet over EDGE. Connection speeds over EDGE will likely be somewhat slower than they would be over a Wi-Fi network. You will also not be able to answer phone calls while connected to the internet through EDGE. If the iPhone is connected to the internet over EDGE you will see this small icon at the top of your screen:
for more information you can go thru this link
http://support.apple.com/kb/ts2756

Hope this helps. Please rate my response.
Thanks.
Have a good day

I have a perfect solution for that!

You just need to install Push Fix from Cydia. Click here to see the step by step instruction on how to do that.

For more iPhone / iPod touch tips, click here.

...

Unlock:
- 1st Generation iPhone (up to version 3.1.2)
- iPhone 3G (up to version 3.1.2)
- iPhone 3GS (up to version 3.1.2)
Jailbreak:
- 1st Generation iPhone (up to version 3.1.2)
- iPhone 3G (up to version 3.1.2)
- iPhone 3GS (up to version 3.1.2)
Features:
- Use any GSM Sim card worldwide
- Jailbreak
- Custom ringtones and wallpapers
- Third-party applications
- Enable full iPod capabilities
- Safari, YouTube, Google Maps, Notes, Photos, E-mail
- WiFi/Edge Connection
- And a lot more ..

http://www.3gsiphoneunlocking.com/

The youtube app on the phone is provided by the network (original provider of the phone) so unless t-mobile provide that (and other services) you can't use it... but you can connect to the normal youtube by using safari it just wont be optimised for the iphone like the app is

You need either GPRS enabled with your SIM card or WI-Fi enabled.
For GPRS enabling, go to Settings ->Network->EDGE->APN -type your SIM Card GPRS site address, ask your SIM provider for the details. Username-put your phone number with country code and Password-put what is there for your SIM.

For Wi-Fi enabling, go to Settings -> Wi-Fi-set it to ON and it would automatically search for nearby connections. If you find one unlocked, just select that and start using internet via SAFARI!!!

Hi This is vijay from india, just copy all these three files and with the help of Winscp overwrite the existing ones. it will work. in my case it is working alright.

I FINALLY GOT YOUTUBE WORKING on 1.1.4...
Step 1: backup your settings and files on itunes
Step 2: restore iphone to default( this will erase everything)
Step 3: try Youtube before Jailbreak to make sure its working
Step 4: ***important*** run ziphone for JAILBREAK only!
YouTUBE remains working. when I tried to DO-IT-ALL youtube never worked afterwards.
Step 5: Sync iphone to get your settings, contacts, emails back

bandwidth?