hi3536c + 4G模块（ME909s 821）拨号

目前拨号问题：       
>>  ^M
>>  AT+CGDCONT=1,"IP","CTNET"^M^M
>>   OK
>>>> send (ATDT*99#^M)
expect (  --- CONNECT)

>>  ^M
>>  ATDT*99#^M^M
NO CARRIER
-- failed
Failed (NO CARRIER)
Script /usr/sbin/chat -s -v -f /etc/ppp/huawei-chat finished (pid 653), status = 0x4
Connect script failed
>>>>>>> got_sigchld  = 1

拨号脚本1：/etc/ppp/huawei-chat
ABORT "NO CARRIER"
ABORT "NO DIALTONE"
ABORT "ERROR"
ABORT "NO ANSWER"
ABORT "BUSY"
ABORT "Username/Password Incorrect"   
""      AT
OK  ATH0
OK      AT+CGDCONT=1,"IP","CTNET"
OK      ATDT*99#
CONNECT ""

拨号脚本2：/etc/ppp/peers/huawei-dial
/dev/ttyUSB0
115200
crtscts
modem
debug
nodetach
usepeerdns
noipdefault
defaultroute
0.0.0.0:0.0.0.0
persist
noauth
-pap
-mschap
-mschap-v2
ipcp-accept-local
ipcp-accept-remote
connect '/usr/sbin/chat -s -v -f /etc/ppp/huawei-chat'

设备节点已经存在，option也添加了vid,pid
/dev/ttyUSB0  /dev/ttyUSB1  /dev/ttyUSB2  /dev/ttyUSB3  /dev/ttyUSB4

使用电信卡拨号，请大神帮忙看看什么问题？