Ubuntu 16.04 Huawei modem disconnects

Hi I have just installed Ubuntu 16.04 and now my Huawei E 3131 modem disconnects after a few seconds, modem-manager also disappears.

usb-devices shows :

T: Bus=04 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 5 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=12d1 ProdID=1506 Rev=01.02
S: Manufacturer=HUAWEI
S: Product=HUAWEI Mobile
C: #Ifs= 6 Cfg#= 1 Atr=80 MxPwr=500mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=02 Prot=01 Driver=option
I: If#= 1 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=16 Driver=option
I: If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=02 Prot=03 Driver=option
I: If#= 3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=02 Prot=02 Driver=option
I: If#= 4 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
I: If#= 5 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage

Please help, I would like to have my internet back

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Ubuntu 16.04 Huawei modem disconnects

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