However, the software was not without its flaws. Users frequently encountered issues with compatibility as operating systems evolved. A dongle purchased for Windows XP often required patching or manual driver updates to function correctly on Windows 7 or 8. Additionally, the software could be resource-heavy for the computers of the time, sometimes causing system lag or freezing. The locked nature of the software—often branded by mobile operators like Airtel, Telkomsel, or Movistar—also frustrated users who wanted to switch SIM cards, leading to a cottage industry of "unlocker" software and alternative connection managers like "Mobile Partner."