4g modem HUAWEI E3372s don't work in HILINK mode.

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What steps will reproduce the problem?
1. firmware upgrade RT-N65U_3.0.3.9-096_base

What is the expected output? What do you see instead?
4g modem HUAWEI E3372s mast work in HILINK mode.

What version of the product are you using? On what operating system?
RT-N65U_3.0.3.9-096_base

Please describe the problem as detailed as it's possible.
If you have connection problem, then syslog file is required. (please do
attach it as a file)
Note that if there will be a poor problem description the issue status will
be changed to 'Invalid'!
3g modem E173 now work after 4 reboots, but E3372s still not.

Original issue reported on code.google.com by [email protected] on 10 Aug 2015 at 6:44