[HowTo] GPRS/3G/HSDPA/UMTS USB modem Huawei E220 on Asus router

[newbiefan]

ATT: This Firmware is outdated. You can use this one: http://code.google.com/p/wl500g/

The Huawei E220 modem is more and more used as a mobile internet access.
Well, wouldn't it be nice to have a cheap wireless-router, capable to be installed fast and elsewhere?
A mobile USB modem and a Linux-Router allows you to achieve it!
Whether at the alpine-cabin, at the car park, campground or Grandma's, everywhere internet for all!
The Huawei E220 modem is increasingly used from an unbelieveable amount of isp's throughout the world.
An adaption of Olegs grandiose firmware called Koppel FW gives you the unique opportunity to turn your low price asus router
to a full fledged gprs/umts wireless router in an easy way.
Please read the entire howto before any installation.
FIRMWARE FOR WL500GPV2 IS AVAILABLE NOW!!
The firmware is available for Asus Wl500gP, g, gx
-Download http://koppel.cz/cdmawifi/download (newest adapted, stable Oleg FW)
-Set at routers web interface, system setup to factory default. (of course apply & finish)
-Wait for reboot and click at menu system setup 'firmware upgrade' to upload your new firmware (1.71).
-Please wait several minutes and do not touch/unplug anything.....
THE LATEST FIRMWARE-RELEASE (1.69) SUPPORTS ALREADY THE HUAWEI E220 MODEM (SINCE 1.68).
Click on GSM / GPRS and input your data of your isp - done.
FOR ALL OLDER VERSIONS (<1.68) YOU NEED THE ATTACHED FILE 'dial.huawei.tar.gz' (or if your connection speed is too slow).
-After reboot choose USB Connection and select User defined.
-Upload attached user dial-up file 'dial.huawei.tar.gz'
-Then USB connection, dial-up Config, your username / password / APN / dialin number. (some isp don't need usernames/passwords)
Then apply and finish.

After each reboot the router connects automatically to inet. Use the webif to toggle between connect and disconnect.
Please note, that the modem must be switched with "windows mobile connect" to 3g preferred enabled and pin code disabled.
If you don't have your dial-in number and/or APN, just google for it or call support line of your isp.

With newer asus-routers (wl-500gp), perhaps you get a weak or no wireless signal. If this is the case, please log on (telnet) to your router (192.168.1.1) and add
to your post-boot (stored at /tmp/local/sbin/post-boot) with 'vi /tmp/local/sbin/post-boot' (if you are not firm with vi, google for vi manual, it's easy):

'wl antdiv 3'

This allows the router to select the best antenna.
As usual, store your post-boot with 'flashfs save && flashfs commit && flashfs enable && reboot'.

This HowTo is an excerpt from english Wl500g forum http://wl500g.info/showthread.php?t=7318
and (a german) UMTS Forum http://www.umtslink.at/3g-forum/showthread.php?p=528907
And last, but not least, many thanks to Oleg and Engy for such a grandiose firmware.
Have fun.........