Hello just have buy AR300M, software version is 2.27.
There is no 3G/4G USB Modem working! Modem are working with PC and MR3020 router.
Back to 2.264 have the same issue.
Please see log:
Huawei K4203
Tue Apr 10 06:28:05 2018 kern.info kernel: [ 178.316823] usb 1-1: new high-speed USB device number 2 using ehci-platform
Tue Apr 10 06:28:06 2018 kern.info kernel: [ 178.520036] usb-storage 1-1:1.0: USB Mass Storage device detected
Tue Apr 10 06:28:06 2018 kern.info kernel: [ 178.536955] scsi host0: usb-storage 1-1:1.0
Tue Apr 10 06:28:06 2018 kern.info kernel: [ 178.992778] usb 1-1: USB disconnect, device number 2
Tue Apr 10 06:28:08 2018 kern.info kernel: [ 180.486829] usb 1-1: new high-speed USB device number 3 using ehci-platform
Tue Apr 10 06:28:08 2018 kern.info kernel: [ 180.829504] cdc_ether 1-1:1.0 eth2: register ‘cdc_ether’ at usb-ehci-platform-1, CDC Ethernet Device, 00:1e:10:1f:00:00
Tue Apr 10 06:30:48 2018 kern.info kernel: [ 340.957727] usb 1-1: USB disconnect, device number 3
Tue Apr 10 06:30:48 2018 kern.info kernel: [ 340.962994] cdc_ether 1-1:1.0 eth2: unregister ‘cdc_ether’ usb-ehci-platform-1, CDC Ethernet Device
Huawei E3531
Tue Apr 10 06:33:52 2018 kern.info kernel: [ 524.856825] usb 1-1: new high-speed USB device number 4 using ehci-platform
Tue Apr 10 06:33:52 2018 kern.info kernel: [ 525.073017] usb-storage 1-1:1.0: USB Mass Storage device detected
Tue Apr 10 06:33:52 2018 kern.info kernel: [ 525.087296] scsi host1: usb-storage 1-1:1.0
Tue Apr 10 06:33:53 2018 kern.info kernel: [ 525.714715] usb 1-1: USB disconnect, device number 4
Tue Apr 10 06:33:53 2018 kern.info kernel: [ 526.226804] usb 1-1: new high-speed USB device number 5 using ehci-platform
Tue Apr 10 06:33:54 2018 kern.info kernel: [ 526.610031] cdc_ether 1-1:1.0 usb0: register ‘cdc_ether’ at usb-ehci-platform-1, CDC Ethernet Device, d2:60:c8:b6:65:46
Tue Apr 10 06:33:54 2018 kern.info kernel: [ 526.633163] usb-storage 1-1:1.2: USB Mass Storage device detected
Tue Apr 10 06:33:54 2018 kern.info kernel: [ 526.657111] scsi host2: usb-storage 1-1:1.2
Tue Apr 10 06:33:55 2018 kern.notice kernel: [ 527.657894] scsi 2:0:0:0: Direct-Access HUAWEI TF CARD Storage 2.31 PQ: 0 ANSI: 2
Tue Apr 10 06:33:55 2018 kern.notice kernel: [ 527.674211] sd 2:0:0:0: [sda] Attached SCSI removable disk
Tue Apr 10 06:37:42 2018 kern.info kernel: [ 754.925958] usb 1-1: USB disconnect, device number 5
Tue Apr 10 06:37:42 2018 kern.info kernel: [ 754.931285] cdc_ether 1-1:1.0 usb0: unregister ‘cdc_ether’ usb-ehci-platform-1, CDC Ethernet Device
ZTE MF823
Tue Apr 10 06:45:46 2018 kern.info kernel: [ 1238.766762] usb 1-1: new high-speed USB device number 6 using ehci-platform
Tue Apr 10 06:45:46 2018 kern.info kernel: [ 1238.962730] usb-storage 1-1:1.0: USB Mass Storage device detected
Tue Apr 10 06:45:46 2018 kern.info kernel: [ 1238.974433] usb-storage 1-1:1.0: Quirks match for vid 19d2 pid 1225: 1
Tue Apr 10 06:45:46 2018 kern.info kernel: [ 1238.986211] scsi host3: usb-storage 1-1:1.0
Tue Apr 10 06:45:51 2018 kern.info kernel: [ 1244.479683] usb 1-1: USB disconnect, device number 6
Tue Apr 10 06:45:52 2018 kern.info kernel: [ 1245.146785] usb 1-1: new high-speed USB device number 7 using ehci-platform
Tue Apr 10 06:45:52 2018 kern.info kernel: [ 1245.345720] rndis_host 1-1:1.0 usb0: register ‘rndis_host’ at usb-ehci-platform-1, RNDIS device, 36:4b:50:b7:ef:49
Tue Apr 10 06:45:52 2018 kern.info kernel: [ 1245.369631] usb-storage 1-1:1.2: USB Mass Storage device detected
Tue Apr 10 06:45:52 2018 kern.info kernel: [ 1245.387162] scsi host4: usb-storage 1-1:1.2
Tue Apr 10 06:45:53 2018 kern.notice kernel: [ 1246.389110] scsi 4:0:0:0: CD-ROM CWID USB SCSI CD-ROM 2.31 PQ: 0 ANSI: 2
Tue Apr 10 06:45:53 2018 kern.notice kernel: [ 1246.407732] scsi 4:0:0:1: Direct-Access ZTE MMC Storage 2.31 PQ: 0 ANSI: 2
Tue Apr 10 06:45:53 2018 kern.notice kernel: [ 1246.422210] sd 4:0:0:1: [sda] Attached SCSI removable disk
Tue Apr 10 06:50:24 2018 kern.info kernel: [ 1516.497530] usb 1-1: USB disconnect, device number 7
Tue Apr 10 06:50:24 2018 kern.info kernel: [ 1516.502809] rndis_host 1-1:1.0 usb0: unregister ‘rndis_host’ usb-ehci-platform-1, RNDIS device