Just run the 3g apk file will do. It will create mobile network in your settings/wireless network. Those ADB push methods were the earlier development, just ignore it
Those propritary telco modems might have issue you can try. Flashing the modem could do it

Use the celcom huawei alternative e173 model will work. The celcom supplied usb modem built in celcom software might have issue but if you flsdh this modem to stock rom it will definitely work. This celcom modem is in the approved modem list for iconia. So another way buy the original huawei e173 n plug in your celcom card

Sorry guys I gave you wrong info. You flasH the 3g usb zip file in recovery.  It is not an apk file. After flash you will see mobile networks at settings/wireless networks

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Added on June 26, 2011, 9:12 pmhttp://forum.xda-developers.com/showthread.php?t=1118639

The list of huawei compatible modems. E1550 is one of them

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Added on June 26, 2011, 9:14 pmPendekar if you want you can try flash your usb modem to stock rom. Disadvantage when you plug in PC is not auto anymore,  just key in manually the celcom apn settings. Alternative buy another huawei generic modem not tied to any telco

For those who are willing to try. Unlock your huawei e1550 modem

http://www.modemunlock.com/huawei-e1550-un...-usb-modem.html