Off course it is, various studies has been completed by many researchers regarding usage of smartphone associated with depression, obesity, neck pain, stress, etc. All above mentioned found a positive significant results. Read your conference paper regarding mentioned title it found to me with very interesting results but size of the sample disappointed me. This can be done on large sample size with different populations that might increase much and more interesting results which can be generalized and that result may open the gate for others topics as well create food for thought. interesting topic related to daily life. Once again Congratulation
There are many studies investigated the association between neck pain and extensive uses of smartphones in young and old adults. Most of these studies supported that the extensive and long term uses of smartphones (especially, high load postures such as forward neck posture, high degree of cervical flexion or people with weak neck muscles) are associated with neck and upper extremities symptoms.
Please find the attached relevant articles that may help you