Does constant smartphone use such as texting, browsing, or calling cause brain cancer or any other types of cancer?

Lack of evidence: This issue has been examined and there is no objective evidence that cell phone use has adverse health effects. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Get HPV vaccine. Wish you good health!