I used this company's router. It worked smoothly. ...

I used this company's router. It worked smoothly. What every launch he whined to get updated. I left out. Until finally I gave this update. The device stopped working after it (a bug in the software that prevents the connection from the SIM card without simlock). I called technical support, except that the woman working there can not advise anything constructive except for specialist advice "on / off, another sim card, etc.", she said that I had to send the device to the service - ATTENTION for which I should pay. Yes - the manufacturer issues an update with an error, and then I have to pay for servicing the device!