The TP-Link MR3420 is a popular wireless router that supports 3G/4G mobile broadband connectivity. The V5 version of the firmware brings several improvements and fixes to the device.
You can find user reviews and feedback on various forums and websites, such as Reddit, TP-Link's forums, or review websites. Keep in mind that experiences may vary depending on individual configurations and networks. tplink mr3420 v5 firmware