Perform firmware upgrade

If you are reading this, you likely own the and have noticed that little "C1" printed on the sticker at the bottom. While this ADSL2+ modem-router has been a workhorse for years, managing its firmware can be a confusing ordeal.

For the DSL-2750U C1, firmware updates have been sparse. D-Link typically releases these updates through regional ISP partners rather than a centralized global download page. Consequently, many users find themselves running outdated firmware years after purchase.

Official firmware varies by region. Popular versions for the C1 hardware include: ME_1.10_B038.