Ok, here I am again after some tests with the new script from PicTux.
I'm not able to connect, unfortunately.
Here is a SystemLog:
...
May 1 08:03:05 supermarioyun kern.info kernel: [ 400.930000] usb 1-1.1: USB disconnect, device number 19
May 1 08:03:10 supermarioyun kern.info kernel: [ 406.290000] usb 1-1.1: new high-speed USB device number 20 using ehci-platform
May 1 08:03:11 supermarioyun kern.info kernel: [ 406.430000] usb 1-1.1: New USB device found, idVendor=19d2, idProduct=0064
May 1 08:03:11 supermarioyun kern.info kernel: [ 406.430000] usb 1-1.1: New USB device strings: Mfr=2, Product=1, SerialNumber=0
May 1 08:03:11 supermarioyun kern.info kernel: [ 406.430000] usb 1-1.1: Product: ZTE CDMA Technologies MSM
May 1 08:03:11 supermarioyun kern.info kernel: [ 406.430000] usb 1-1.1: Manufacturer: ZTE,Incorporated
May 1 08:03:11 supermarioyun kern.info kernel: [ 406.440000] option 1-1.1:1.0: GSM modem (1-port) converter detected
May 1 08:03:11 supermarioyun kern.info kernel: [ 406.440000] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB0
May 1 08:03:11 supermarioyun kern.info kernel: [ 406.450000] scsi17 : usb-storage 1-1.1:1.1
May 1 08:03:11 supermarioyun kern.info kernel: [ 406.450000] option 1-1.1:1.2: GSM modem (1-port) converter detected
May 1 08:03:11 supermarioyun kern.info kernel: [ 406.450000] usb 1-1.1: GSM modem (1-port) converter now attached to ttyUSB1
May 1 08:03:12 supermarioyun kern.notice kernel: [ 407.450000] scsi 17:0:0:0: Direct-Access ZTE MMC Storage 2.31 PQ: 0 ANSI: 2
May 1 08:03:12 supermarioyun kern.notice kernel: [ 407.470000] sd 17:0:0:0: [sdb] Attached SCSI removable disk
May 1 08:03:21 supermarioyun kern.err kernel: [ 416.820000] hub 1-1:1.0: cannot reset port 4 (err = -71)
May 1 08:03:21 supermarioyun kern.err kernel: [ 416.820000] hub 1-1:1.0: cannot reset port 4 (err = -71)
May 1 08:03:21 supermarioyun kern.err kernel: [ 416.990000] option1 ttyUSB1: option_instat_callback: error -71
May 1 08:03:21 supermarioyun kern.info kernel: [ 417.060000] usb 1-1.1: USB disconnect, device number 20
May 1 08:03:21 supermarioyun kern.info kernel: [ 417.060000] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
May 1 08:03:21 supermarioyun kern.info kernel: [ 417.060000] option 1-1.1:1.0: device disconnected
May 1 08:03:21 supermarioyun kern.err kernel: [ 417.070000] option1 ttyUSB1: option_instat_callback: error -143
May 1 08:03:21 supermarioyun kern.info kernel: [ 417.070000] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
May 1 08:03:21 supermarioyun kern.info kernel: [ 417.080000] option 1-1.1:1.2: device disconnected
May 1 08:03:21 supermarioyun kern.info kernel: [ 417.100000] usb 1-1.4: reset high-speed USB device number 4 using ehci-platform
May 1 08:03:21 supermarioyun kern.err kernel: [ 417.210000] usb 1-1.4: device descriptor read/64, error -71
May 1 08:03:23 supermarioyun kern.err kernel: [ 418.720000] sd 1:0:0:0: [sda] No Caching mode page present
May 1 08:03:23 supermarioyun kern.err kernel: [ 418.720000] sd 1:0:0:0: [sda] Assuming drive cache: write through
May 1 08:03:23 supermarioyun user.info sysinit: cat: can't open '/sys/bus/scsi/drivers/sd/17:0:0:0/block/sdb/size': No such file or directory
May 1 08:03:27 supermarioyun kern.info kernel: [ 422.420000] usb 1-1.1: new high-speed USB device number 21 using ehci-platform
May 1 08:03:27 supermarioyun kern.info kernel: [ 422.560000] usb 1-1.1: New USB device found, idVendor=19d2, idProduct=2000
May 1 08:03:27 supermarioyun kern.info kernel: [ 422.560000] usb 1-1.1: New USB device strings: Mfr=2, Product=1, SerialNumber=3
May 1 08:03:27 supermarioyun kern.info kernel: [ 422.560000] usb 1-1.1: Product: ZTE CDMA Technologies MSM
May 1 08:03:27 supermarioyun kern.info kernel: [ 422.570000] usb 1-1.1: Manufacturer: ZTE,Incorporated
May 1 08:03:27 supermarioyun kern.info kernel: [ 422.570000] usb 1-1.1: SerialNumber: 3AUP673A4CDROMMS
May 1 08:03:27 supermarioyun kern.info kernel: [ 422.570000] scsi18 : usb-storage 1-1.1:1.0
May 1 08:03:28 supermarioyun kern.notice kernel: [ 423.580000] scsi 18:0:0:0: CD-ROM ZTE USB SCSI CD-ROM 2.31 PQ: 0 ANSI: 2
May 1 08:03:30 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Switching seemingly failed
May 1 08:03:31 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Switching seemingly failed
May 1 08:03:32 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Switching seemingly failed
May 1 08:03:33 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Switching seemingly failed
May 1 08:03:34 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Switching seemingly failed
May 1 08:03:35 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Switching seemingly failed
May 1 08:03:37 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Switching seemingly failed
May 1 08:03:38 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Manufacturer=ZTE,Incorporated Product=ZTE_CDMA_Technologies_MSM Serial=3AUP673A4CDROMMS
May 1 08:03:38 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Selecting /etc/usb_modeswitch.d/19d2:2000 for mode switching
May 1 08:03:38 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Switching seemingly failed
May 1 08:03:39 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Switching seemingly failed
May 1 08:03:40 supermarioyun kern.info kernel: [ 435.750000] usb 1-1.1: USB disconnect, device number 21
May 1 08:03:40 supermarioyun user.notice usb-modeswitch: 1-1.1:1.1: Manufacturer=? Product=? Serial=?
May 1 08:03:41 supermarioyun user.notice usb-modeswitch: 1-1.1:1.2: Manufacturer=? Product=? Serial=?
May 1 08:03:42 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Manufacturer=? Product=? Serial=?
May 1 08:03:44 supermarioyun kern.info kernel: [ 440.340000] usb 1-1.1: new high-speed USB device number 22 using ehci-platform
May 1 08:03:45 supermarioyun kern.info kernel: [ 440.480000] usb 1-1.1: New USB device found, idVendor=19d2, idProduct=2000
May 1 08:03:45 supermarioyun kern.info kernel: [ 440.480000] usb 1-1.1: New USB device strings: Mfr=2, Product=1, SerialNumber=3
May 1 08:03:45 supermarioyun kern.info kernel: [ 440.480000] usb 1-1.1: Product: ZTE CDMA Technologies MSM
May 1 08:03:45 supermarioyun kern.info kernel: [ 440.490000] usb 1-1.1: Manufacturer: ZTE,Incorporated
May 1 08:03:45 supermarioyun kern.info kernel: [ 440.490000] usb 1-1.1: SerialNumber: 3AUP673A4CDROMMS
May 1 08:03:45 supermarioyun kern.info kernel: [ 440.500000] scsi19 : usb-storage 1-1.1:1.0
May 1 08:03:45 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Manufacturer=ZTE,Incorporated Product=ZTE_CDMA_Technologies_MSM Serial=3AUP673A4CDROMMS
May 1 08:03:45 supermarioyun user.notice usb-modeswitch: 1-1.1:1.0: Selecting /etc/usb_modeswitch.d/19d2:2000 for mode switching
May 1 08:03:45 supermarioyun syslog.notice usb_modeswitch: switching device 19d2:2000 on 001/022
May 1 08:03:50 supermarioyun kern.info kernel: [ 445.990000] usb 1-1.1: USB disconnect, device number 22