@Franz99 have you removed the battery after the update? if not, you can have a try and resinstall it, then see what happens. can you name which led indicator blink? and under what circumstances？

Send all the logs here,pls

Can you try another sim card from a different isp? Is the pocket wifi allowed to use the sim card for phone ? if so, you can try it, The wifi may be interfered with other 2.4G devices, so the wired...

@DOSSIP47 What's the exact version of your M7350 ? What's your environment like when using the device? Have you try the same sim card on your phone and see its speed and stability? if not, you can...

@Franz99 Try connect it to a pc and see if you can find it in the deivce manager as a RNDIS network adapter. In case of the mifi in off charge mode, you can open a cmd and input “ipconfig” to see if...

@Fadaei 1. Are you using the original wire？if not ，try it out 2. Try other usb ports on your pc, and if possible, try another pc, “flash write failure” may be due to unstable power supply and send...