Ureteral stents has become an indispensable instrument for urology practice as a result of widespread use of endourological interventions. Removal of stents could be sometimes neglected by patients or physicians. This omission may lead to legal and medical problems for urologists, health institutions and also for patients. In this study, the investigators offer a computer program providing two sided recall to prevent this nasty complication with sending automatic message by short message service (SMS) to both the patient and the urologist.