currently I am facing lots of issue with my huawei modem of e1550 actually in this after I improve the firmware from version 11.608.12.04.21 to version 11.608.09.01.21. Regarding this I knpow that it is launched by the Australia and now it is not working in some of the country. In this my main problem is the modem is not able to become aware of the network signal. Actually, I require the firmware huawei E1550 version 11.608.09.01.21 to resolve my trouble. So please help me.