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SubjectSierra Wireless (MC8780) HSDPA speed issue

I have a Sierra Wireless MC8780 UMTS card in a Fujitsu S6410 laptop running
kernel In kernel sierra driver v1.3.2.

The card works but speed seems limited to approx 1.0 Mbit/s download using the
linux driver. Testing the card in Windows XP yields download speeds close to
5.0 Mbit/s.

I recently updated the firmware of the card to support HSDPA/HSUPA. The update
gave the desired result in Windows but not in Linux. The speed improved in
Linux but didn't increase above 1 Mbit/s.

Is there any known driver limitations or is this a configuration issue?

Please let me know if you need any additional information.

Best regards, Ralf

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