在android 4.2.2上调试MU609步骤，WCDMA
#define HUAWEI_PRODUCT_E353 0x1506更新了firmware之后ID号改为：#define HUAWEI_PRODUCT_E353 0x1573
2.对kernel进行配置，make menuconfig打开以下几项
Device Drivers -> USB support -> USB Serial Converter support -> <*> USB driver for GSM and CDMA modems
Device Drivers -> Network device support -> PPP (point-to-point protocol) support -> <*> PPP MPPE compression (encryption) (EXPERIMENTAL)
Device Drivers -> Network device support -> PPP (point-to-point protocol) support -> <*> PPP support for async serial ports第一个选项打开之后开机就会识别到MU609为GSM modem，否则只会看到有USB插拔的信息，不会识别为GSM MODEM，正确识别后的Log如下：
<6>[ 1.929557] usb 3-1: new high-speed USB device number 2 using exynos-xhci
<6>[ 1.949389] usb 3-1: New USB device found, idVendor=12d1, idProduct=1506
<6>[ 1.949483] usb 3-1: New USB device strings: Mfr=3, Product=2, SerialNumber=0
<6>[ 1.949595] usb 3-1: Product: HUAWEI Mobile
<6>[ 1.949645] usb 3-1: Manufacturer: Huawei Technologies
<6>[ 1.949950] mmc_host mmc1: Bus speed (slot 0) = 25000000Hz (slot req 400000Hz, actual 390625HZ div = 32)
<6>[ 1.956711] option 3-1:1.0: GSM modem (1-port) converter detected
<6>[ 1.956911] usb 3-1: GSM modem (1-port) converter now attached to ttyUSB0
<6>[ 1.957187] option 3-1:1.1: GSM modem (1-port) converter detected
<6>[ 1.957353] usb 3-1: GSM modem (1-port) converter now attached to ttyUSB1
<6>[ 1.957588] option 3-1:1.2: GSM modem (1-port) converter detected
<6>[ 1.957729] usb 3-1: GSM modem (1-port) converter now attached to ttyUSB2第二和第三个选项打开之后pppd才可以建立ppp0接口，否则logcat会出现如下pppd错误信息：
Couldn't set tty to PPP discipline: Invalid argument此时虽然rild已经运行，apn也设置好了但是仍旧无法上网，netcfg看不到ppp0接口。
3.copy libhuawei-ril.so,ip-up,ip-down到指定位置，修改device.mk，添加：
# stone add mu609
PRODUCT_COPY_FILES += \
$(LOCAL_PATH)/mu609/libhuawei-ril.so:system/lib/libhuawei-ril.so \
$(LOCAL_PATH)/mu609/ip-up:system/etc/ppp/ip-up \
$(LOCAL_PATH)/mu609/ip-down:system/etc/ppp/ip-down \
$(LOCAL_PATH)/mu609/chat:system/bin/chat \
$(LOCAL_PATH)/mu609/busybox:system/bin/busybox最后两个chat和busybox是为了调试方便加进去的。
4.修改android\system\core\rootdir\init.rc,添加ttyUSB权限和ril的加载
on boot
# stone add mu609
chmod 777 /dev/ttyUSB0
chmod 777 /dev/ttyUSB2
chmod 777 /etc/ppp/ip-up
chmod 777 /etc/ppp/ip-down
# stone modify mu609
service ril-daemon /system/bin/rild -l libhuawei-ril.so
5.修改android\hardware\ril\rild\rild.c,按照mu609 porting guide屏蔽掉switchUser();这行代码，如果不屏蔽掉会出现手动拨号正常，但是android下提示pppd缺少模块的情况，如下：
E/pppd ( 2082): This system lacks kernel support for PPP. This could be because
E/pppd ( 2082): the PPP kernel module could not be loaded, or because PPP was not
E/pppd ( 2082): included in the kernel configuration. If PPP was included as a
E/pppd ( 2082): module, try `/sbin/modprobe -v ppp'. If that fails, check that
E/pppd ( 2082): ppp.o exists in /lib/modules/`uname -r`/net.
E/pppd ( 2082): See README.linux file in the ppp distribution for more details.到此就已经porting完了，如果出问题了还要排查，现在从底层开始一步步排查验证。
1.首先要确定mu609模块识别到了没有，可以在shell下busybox lsusb查看usb设备，如果出现如下信息，就是已经识别到mu609了。
shell@android:/ # busybox lsusb
Bus 003 Device 002: ID 12d1:1506
2.查看ttyUSB接口属性是否修改为0777
shell@android:/ # ll /dev/ttyUSB*
crwxrwxrwx root root 188, 0 2013-05-15 12:01 ttyUSB0
crw------- root root 188, 1 2013-05-15 12:00 ttyUSB1
crwxrwxrwx root root 188, 2 2013-05-15 12:00 ttyUSB2
3.模块已经识别了，ttyUSB接口都有，现在手动发AT命令看mu609是否响应。
shell@android:/ # cd /dev/
shell@android:/dev # cat ttyUSB0 &
[1] 869
shell@android:/dev # echo AT+CGMI > ttyUSB0
shell@android:/dev #
Huawei Technologies Co., Ltd.
OK
shell@android:/dev # echo AT+CGMM > ttyUSB0
shell@android:/dev #
MU609
OK
shell@android:/dev # OK，mu609正常响应了。
4.现在先抛开上层RIL不管，单纯从shell手动拨号看能否正常工作。需要自己写两个脚本，拷贝到/etc/ppp目录下
第一个脚本是/etc/ppp/chat/unicom,内容如下:
# this is the chat script for unicom
ABORT "NO CARRIER"
ABORT "NO DIALTONE"
ABORT "ERROR"
ABORT "NO ANSWER"
ABORT "BUSY"
TIMEOUT 120
"" at
OK AT+CGDCONT=1,"IP","3gnet"
OK atdt*99***1#
CONNECT第二个脚本是/etc/ppp/peers/unicom,内容如下:
# /system/etc/ppp/peers/unicom
/dev/ttyUSB0
115200
crtscts
connect '/system/bin/chat -s -v -f /system/etc/ppp/chat/unicom'
debug
nodetach
ipcp-accept-local
ipcp-accept-remote
defaultroute
usepeerdns
user card
password cardchat和peers两个目录没有，需要自己mkdir。还需要用到chat，就是之前在device.mk中copy过来的，android自身不带，在我的资源中有编译好的。因为rild一开始就会启动，把pppd搞起来，影响手动拨号，所以要先把rild改个名字，这样rild服务就不会起来了
mv /system/bin/rild /system/bin/ril-d改完后记得重启机器。好了，现在可以手动拨号了:
shell@android:/ # pppd call unicom &
[1] 912
shell@android:/ # abort on (NO CARRIER)
abort on (NO DIALTONE)
abort on (ERROR)
abort on (NO ANSWER)
abort on (BUSY)
timeout set to 120 seconds
send (at^M)
expect (OK)
^M
OK
-- got it
send (AT+CGDCONT=1,"IP","3gnet"^M)
expect (OK)
^M
^M
OK
-- got it
send (atdt*99***1#^M)
expect (CONNECT)
^M
^M
CONNECT
-- got it
shell@android:/ #好了，到这里就算是拨号成功了，然后看ppp0接口是否建立。
shell@android:/ # netcfg
ip6tnl0 DOWN 0.0.0.0/0 0x00000080 00:00:00:00:00:00
lo UP 127.0.0.1/8 0x00000049 00:00:00:00:00:00
ppp0 UP 10.105.219.114/32 0x000010d1 00:00:00:00:00:00
sit0 DOWN 0.0.0.0/0 0x00000080 00:00:00:00:00:00
shell@android:/ # 好了，ppp0接口也建立了，ip地址也获得了，ping一下baidu试试看。
shell@android:/ # ping www.baidu.com
PING www.a.shifen.com (220.181.112.143) 56(84) bytes of data.
64 bytes from 220.181.112.143: icmp_seq=1 ttl=48 time=164 ms
64 bytes from 220.181.112.143: icmp_seq=2 ttl=48 time=172 ms
64 bytes from 220.181.112.143: icmp_seq=3 ttl=48 time=160 ms
^C64 bytes from 220.181.112.143: icmp_seq=4 ttl=48 time=148 ms
--- www.a.shifen.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 148.703/161.427/172.377/8.508 ms
shell@android:/ #OK，一切正常，现在可以确定拨号没有问题了，剩下验证android上层ril是否工作正常了。
5.把rild的名字改回来，进入系统设置一下APN,
APN:3gnet
MCC:460
MNC:01保存，然后重启，起来后就可以在状态栏看到3G的图标了，当然要打开“启动数据网络”选项。
如果没有工作，就"logcat -b radio &"看一下ril的log，ril是否认到ttyUSB的接口了。
调试时候经常用到的几个小命令。
netcfg : 查看当前所有网络接口
getprop net.dns1 : 查看dns(有时候dns不对也会上不了网，比如8.8.8.8，这时候需要修改pppd)
logcat -s pppd : 查看pppd log
logcat -b radio &: 查看radio log
cat ttyUSB0 &然后echo AT+CMD > ttyUSB0: 对modem发命令看是否有应答。