user interface outdated + bugs + Customer support doesn't respond
The user interface is completely outdated. I once lost $50 for credit that was never activated, and another $50 because money was deducted directly from my customer balance even when no credit pack was purchased. Customer support doesn't respond. I initially chose OneSimCard for the ability to receive SMS, but that doesn't work either — not with my bank, nor with Google verification services. I've now switched to AIRALO and I'm 100% satisfied. My girlfriend uses HOLAFLY — there are occasional bugs, but she always gets refunded and their customer service is responsive.