Final answer:
An increase in spam calls on cell phones can be due to the use of caller ID spoofing by spammers, the shift from landlines to mobile phones, and our extensive sharing of contact information. Privacy managers can help reduce the number of unwanted calls.
Step-by-step explanation:
Receiving an increasing number of spam calls on your cell phone can be attributed to several factors. With the increased use of caller ID services, spammers often use techniques like number spoofing to disguise their calls, making them appear as though from a local or familiar number to increase the likelihood you will answer. Similarly, the decreased use of landlines has led to a higher concentration of spam calls to mobile devices.
The hectic nature of personal schedules and our constant connection to technology may lead us to give out our numbers more frequently for convenience, thus inadvertently spreading our contact details further. Adding to this, the decreased willingness to be interviewed may discourage people from answering unknown numbers, leading spammers to call more frequently in the hope of reaching someone. Privacy managers and tools to block unknown callers on smartphones can help mitigate this issue.