@cire Hmm, that is weird. You can select "Mode: Custom", but no custom settings appear. Can you please check the exact model description of your router on the label that is stuck to the bottom of the...

@TKEL Hi, Are you talking about this 4G Mobile Wi-Fi device https://www.tp-link.com/en/home-networking/mifi/m7200/ ? If yes, then maybe the battery has discharged to zero during the period of time...

@tester000one Hi, Which hardware version of the T2U do you own? There are versions with MediaTek chip as well as a version with Realtek chip.

@cire Does the configuration GUI on your TP-Link router have these entry fields?

@Athyla Hi, That firmware version was pulled back by TP-Link, because some users experienced problems with it. https://community.tp-link.com/en/home/forum/topic/594854 The solution to your problem...

@cire Hi, Somehow it has become fashionable in recent times to put the things related to WAN under the moniker "Internet". So you will find the settings you are looking for in the menu "Advanced" ->...