Where is the modem device in Samsung s5 G900F ?

Hi,

After having use this tutorial http://ift.tt/1tV7PXu

I can't find the modem device in order to send AT Commands, i tried this command

Code:

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busybox microcom -t 5000 /dev/?

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on every devices in /dev but no AT response.

Any idea ?

Cheers

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