Stock Android's Phone app, from Google, will warn you of suspected spammers. To make sure this is enabled, open the app and tap the three-dot menu button at the top-right. Hit Settings, then select Caller ID & spam. Enable the See caller and spam ID slider to identify spam callers when your phone is ringing.

There are a few routes you can take to resolve this issue.

1. Get a new number. If your business number is new and not yet established, it might be easier to get set up with a new phone number.
2. Register your number.
3. Contact the various phone carriers/spam blocking apps directly.

Robokiller is free to download. A subscription is required to use the service, but you can try it out completely free for 7 days. Once the trial ends, your subscription will automatically renew and you'll be billed.

If you have a service or app like AT&T's Call Protect, your iPhone checks incoming calls against a database of known spam numbers. If there is a match, your iPhone will label the call as a “Spam Risk” on the Caller ID screen.

You'll be targeted by even more scammers So they'll keep calling you, sometimes from different phone numbers, trying to get you to answer again. They'll try different schemes, too, as they think you might be an easy target. You can avoid this situation by blocking calls from unknown numbers.

Phone calls are unlikely to be the direct source of phone hacks. But text messages can contain malware, and both calls and texts can be used to launch phishing attacks or other scams to trick you into giving up sensitive information, transferring money, or downloading viruses or spyware.

If you believe your business phone number is currently being flagged as spam on the called party's caller ID, you can contact their telecommunications provider to review your status. After verification, the spam tag may be removed from your business phone number and your status may be updated.

RoboKiller has two primary plans available to users that include the same features, but are billed differently. The Monthly Protection Plan is $4.99 per month and is billed on a monthly basis. The Annual Protection Plan is $3.33 per month but is billed annually at $39.99.

The national Do Not Call list protects landline and wireless phone numbers. You can register your numbers on the national Do Not Call list at no cost by calling 1-888-382-1222 (voice) or 1-866-290-4236 (TTY). You must call from the phone number you wish to register.

Here are some risks of picking up scam calls: You will be subjected to more spam calls. By answering and engaging with a spam call, your number may be marked as “live,” and you will receive more of these calls. Your voice gets recorded for fraudulent activities.

Never answer a call marked as Spam Risk and let it go to voicemail instead. Learn about the most common phishing strategies to recognize deception immediately. Never give away personal information over the phone or email. Double-check claims by contacting service providers directly through their official numbers.

Spam calls can't hack your phone, because signals from cellular service providers aren't able to hack phones themselves. But spam calls may try to trick you into giving up information, which is where the danger lies.