February 2026: Operator Alert - Bulgaria (BG) - BTC Mobile (Vivacom) (284/03;06) - 02/27/2026
Telesign experienced SMS delivery delays in Bulgaria due to network issues with BTC Mobile (Vivacom) operator starting at 9:37 AM PST on February 27, 2026. The network problems caused delays in SMS message delivery to end users on this carrier. The operator resolved their network issues by 11:00 AM PST, restoring normal SMS delivery functionality after approximately 1.4 hours.