[FS#1252] No IP Assigned to Interface with QMI on Quectel EC-25A

[LEDE Bugs]

The following task has a new comment added:

FS#1252 - No IP Assigned to Interface with QMI on Quectel EC-25A
User who did this - Evren Yurtesen (yurtesen)

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No, it does not work as it is.  But it works if I remove `${autoconnect:+--autoconnect}` from it. 

root at OpenWrt:~# wget https://bugs.openwrt.org/index.php?getfile=458
--2018-03-26 14:46:47--  https://bugs.openwrt.org/index.php?getfile=458
Resolving bugs.openwrt.org... 148.251.78.235, 2a01:4f8:202:43ea::3
Connecting to bugs.openwrt.org|148.251.78.235|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 9433 (9.2K) [text/x-shellscript]
Saving to: 'index.php?getfile=458'

index.php?getfile=458                                       100%[========================================================================================================================================>]   9.21K  --.-KB/s    in 0.04s

2018-03-26 14:46:49 (240 KB/s) - 'index.php?getfile=458' saved [9433/9433]

root at OpenWrt:~# mv index.php?getfile\=458 qmi.sh.koen
root at OpenWrt:~# cp qmi.sh.koen /lib/netifd/proto/qmi.sh
root at OpenWrt:~# chmod 775 /lib/netifd/proto/qmi.sh
root at OpenWrt:~# ls -al /lib/netifd/proto/qmi.sh
-rwxrwxr-x    1 root     root          9433 Mar 26 14:47 /lib/netifd/proto/qmi.sh
root at OpenWrt:~#

After reboot (fail, got generic IP):

root at OpenWrt:~# ifconfig wwan0 |grep 'inet addr'
          inet addr:10.37.39.186  P-t-P:10.37.39.186  Mask:255.255.255.252
root at OpenWrt:~#

If I remove `${autoconnect:+--autoconnect}` then reboot again. After reboot:

root at OpenWrt:~# ifconfig wwan0 |grep 'inet addr'
          inet addr:46.132.189.90  P-t-P:46.132.189.90  Mask:255.255.255.252
root at OpenWrt:~#


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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1252#comment4522