Description of problem:
1. NetworkManager can not up mobile internet connection (work in F11)
2. Minicom can communicate with /dev/ttyACM0, but very unstable and freezes after several "AT" commands (work good on F11)
3. Simple script work on F11, but can not work on rawhide.
---
#! /bin/bash

cat /dev/ttyACM0 &
echo -e "ATZ\r" > /dev/ttyACM0;
let I=0
while [ $I -lt 256 ] ;
do
        echo -e "ATI${I}\r" > /dev/ttyACM0;
        let I=${I}+1
        sleep 1;
done
---

Version-Release number of selected component (if applicable):
[root@fedora12a ~]# uname -r
2.6.31-33.fc12.i686

[root@fedora12a ~]# rpm -qa | grep glibc
glibc-2.10.90-22.i686
glibc-common-2.10.90-22.i686
...


[root@fedora12a ~]# dmesg -c ; dmesg
---
usb 1-4: new high speed USB device using ehci_hcd and address 5
usb 1-4: New USB device found, idVendor=0421, idProduct=00e9
usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-4: Product: Nokia 5320 XpressMusic
usb 1-4: Manufacturer: Nokia
usb 1-4: SerialNumber: 354826022435515
usb 1-4: configuration #1 chosen from 1 choice
cdc_acm 1-4:1.0: ttyACM0: USB ACM device
usbcore: registered new interface driver cdc_acm
cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters
NET: Registered protocol family 35
usbcore: registered new interface driver cdc_phonet
usbcore: registered new interface driver cdc_ether
usb 1-4: bad CDC descriptors
usbcore: registered new interface driver rndis_host
cfg80211: Calling CRDA to update world regulatory domain
usb 1-4: bad CDC descriptors
usbcore: registered new interface driver rndis_wlan
cfg80211: World regulatory domain updated:
        (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
        (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
        (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
        (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
        (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
        (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
---

How reproducible:
100%

Steps to Reproduce:
1. Boot the system in runlevel 5
2. Connect mobile phone by USB cable (it is tested with Nokia 5320 XpressMusic).
3. Try to use it as modem (/dev/ttyACM0)
  
Actual results:
modem is partially accessible, but do not work OK. Application, which use it, can crash very quick.

Expected results:
Mobile internet is up and working

Additional info:

Mobile phone device info

ATI0
Nokia
OK

ATI1
354826022435515
OK

ATI2
V 08w35.08
28-11-08  
RM-409    
(c) Nokia 
OK

ATI3
Nokia 5320
OK

ATI4
ICPR71_08w35
OK