a concurrent second call is made on an object before the first is completed

In animals, chronic exposure to Wi-Fi radiation caused behavioral alterations, liver enzyme impairment, pyknotic nucleus, and apoptosis in brain cortex. Overusage of mobile phones may cause psychological illness such as dry eyes, computer vision syndrome, weakness of thumb and wrist, neck pain and rigidity, increased frequency of De Quervain's tenosynovitis, tactile hallucinations, nomophobia, insecurity, delusions, auditory sleep disturbances, insomnia, hallucinations, lower self-confidence, and mobile phone addiction disorders. The recent studies also reported the increase of mobile phone dependence, and this could increase internet addiction. In 2012, new Time Mobility Poll reported that 84% people “couldn't go a single day without their mobile devices.” Around 206 published survey reports suggest that 50% of teens and 27% of parents feel that they are addicted to mobiles. Parlay, the addiction behavior to mobile phone is also increasing. The percentage of households with internet access also increased from 18% in 2005 to 46% in 2015. The percentage of internet usage also increased globally 7-fold from 6.5% to 43% between 20. In 2016, there were more than seven billion users worldwide. The number of mobile cellular subscriptions is constantly increasing every year. In the last few years, hand phones have become an integral part of our lives. Mobile/hand phones are powerful communication devices, first demonstrated by Motorola in 1973, and made commercially available from 1984.

A concurrent second call is made on an object before the first is completed