scam with mobile phone, woman receives a phone call from an unknown number, concept of scammers or strangers, fraud and contact to

alert anonymous answer application bullying business call caller cell cellphone communication concept contact crime dangerous data fake fraud hack hacker hoax identity incognito incoming information internet message mobile network number online person phishing phone privacy promotions receives reject scam scammer scammers screen security sell shadow smartphone spam stranger strangers technology telemarketing telephone unidentified unknown user woman