first, excuse me for not here for details about the types of information, logs and debugs I could leave here because I do not know the kind of information I could put here. if they need more information and details, tell me! independent of the kernel version used the problem is this: when I'm surfing the internet network flow (upload and download) can not stop and browse pages, this problem does not have a right time to happen. when I disconnect, I can, but when trying to connect to the internet again and I can not only get when I take the usb modem and put again, retracing the process of connecting to the internet I can with success. this happens many times a day! My modem is: HUAWEI 3G USB Modem Model: E1553, Operator (Brazil) Oi 2G My system is: Arch Linux i686 information by lsusb is: % lsusb Bus 003 Device 002: ID 12d1:1001 Huawei Technologies Co., Ltd. E169/E620/E800 HSDPA Modem Bus 004 Device 002: ID 15d9:0a4c Trust International B.V. USB+PS/2 Optical Mouse Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub sorry by my english, i are using Google Translate for this. and remeber! if need more informations, tell me! tnx by all!