You have bought all your devices yourself, pacted them out yourself and set them up yourself.
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Always be careful when other people give you a smartphone as a gift, for example. Be particularly skeptical if it has already been set up initially. Spyware could be installed on it. There are also fully set-up phones with spyware on sale, which even inexperienced people can easily use to monitor others. The police have also sold smartphones with pre-installed spyware directly to criminal networks.