--- title: "Loud signal on screen: large-scale testing of the alert system to be conducted in Sumy" description: "Residents of Sumy and the Sumy district have been warned about loud sounds on their phones: on July 23 from 11:00 to 14:00, the alert system will be tested. πŸ“±πŸ”Š The notification will arrive automatically, even if the phone is locked. This is a scheduled check, not a real alarm, however, the topic remains highly relevant following recent strikes on the city. πŸ‡ΊπŸ‡¦" date: 2026-07-21T15:58:00.000Z lang: en url: https://xab.info/en/posts/testing-of-the-alert-system-in-sumy-july-23-en tags: [sumy, ukraine, air-raid-alert, emergency-system] publisher: "XAB.info" --- # Loud signal on screen: large-scale testing of the alert system to be conducted in Sumy ![Smartphone displaying the 'Air Alert' app interface, a key component of Ukraine's civil air raid warning system](https://xab.info/media/2026/07/21/testirovanie-sistemy-opoveshcheniya-v-sumah-23-iyulya/testirovanie-sistemy-opoveshcheniya-v-sumah-23-iyulya-1.webp) Sumy region is preparing for an important check of critical infrastructure. Regional authorities have announced the testing of the population's operational information system, which will affect residents of the city of Sumy and the entire Sumy district. The goal of the event is to ensure the operability of communication channels and the system's readiness for emergency situations. ### Testing details: time and format According to a message from the Sumy Regional Military Administration published on its Telegram channel, the check will take place on July 23. The test period will last three hours β€” from 11:00 to 14:00. During this time window, notifications will be sent to the mobile devices of citizens located within the region. It is important to understand the specifics of the system's operation. The message may arrive at any time during the specified three-hour window. The notification will be accompanied by a loud sound signal designed to attract attention even in a noisy environment. A technical feature of the system is that the notification will automatically appear on the smartphone screen, even if the device is locked or the user is busy working in another application. ### Authorities' reaction and event context Administration representatives emphasize that this is exclusively a scheduled check. Residents are asked to treat the loud signals with understanding and not to panic, as the test notification does not indicate a real threat or the start of an air raid. The decision to conduct the check in the Sumy region is made against the backdrop of a tense situation. We remind you that just two days earlier, on July 21, Russian troops launched a series of strikes on Sumy. One of the targets of the attack was the "Epitsentr" shopping center. The tragedy was exacerbated by the fact that during the liquidation of the consequences of the first strike, emergency service personnel who had arrived at the scene were hit by a second shelling. Under these conditions, checking the alert system becomes a critically important task for ensuring public safety and an operational response to potential threats.