Before adopting Crosscall smartphones, High Security had to equip its lone workers with several safety devices, including a panic button and a verticality test to locate them in case of an emergency. However, these devices were often cumbersome, unreliable, and did not always meet the legal requirements of the security sector. In addition, the need to maintain a quality policy required cutting-edge technological solutions capable of guaranteeing employee safety while offering immediate technical support. The challenge was therefore to find reliable, ergonomic, and durable products that complied with the strict regulations of the security sector.