The first sign: Probably the most famous from various films. This sign is hiss, clicks, any extraneous sounds that neither you nor your interlocutor made. Of course, these can be problems on the line, but if this is repeated almost with every call in different localities, then it is worth considering.
PC
We are used to looking at various flash drives and memory cards as reliable and long-term storage of our files, but this is not entirely true. Let's figure it out.

