I have been working for GMS for a long time and quit my job recently because I couldn't stand the fact that we were cheating our own partners. We cooperate with partners such as Telegram, Viber, Meta (Facebook, WhatsApp), moreover we work with major SMS hubs, which serve SMS traffic Google, Twitch, Twillio, Telesign, but we do this on a daily basis - we register fake accounts with SMS generation which we stop at ourselves (hijack) - making ourselves an impressive profit and robbing service providers. It doesn't matter whether we do it on a transit network or one we protect. We do it easily on our own, Ukrainian 3Mob, Kyrgyz Megacom, Georgian Magticom, Azerbaijan, Bangladesh, Croatia, Bulgaria, Moldova and other countries.
Everyone in the company knows that we pay bribes remaining exclusive in the network and in such countries as Uzbekistan, Kyrgyzstan, Afghanistan, Ukraine and others - they take them without problems and gladly! In general, our business is very dirty and the management's attitude to employees is like a slave! I would strongly advise against going to work at GMS.