I think you can try to disable the smart connect in the wireless settings, if it is enabled, there is only one SSID should be broadcasted.

I got the same problem before, and TP-LINK has offered a beta firmware to fix up this problem, here it is. if the beta didn't work on you, you'd better to feedback to their support. US:...

update. you can also try change another SSID for your WIFI, that should work.

so, the WIFI only disappeared on your Samsung S4 Mini? if so, it mostly likes an incompatibility issue. you are suggested to install an APP named WIFI analyzer on your S4, which can show you the real...

what's the firmware and hardware version of your 841HP? if it is 841hp v1, you are suggested to try the following firmware of 841hp v1.2, which can be also upgraded in 841hp v1....

you can try the latest firmware of TL-WR841HP v1.2, this firmware can be upgraded to v1. as it shows, it seemed to fix a bug of bandwidth control, I think it would be helpful. anyhow, I used this...