Last year I tried out a TP-Link MR3040 (v2) 3G/4G battery powered travel router.
http://www.tp-link.us/products/details/?model=TL-MR3040
I had intended to use it in WISP mode to wifi tether to my phone's AD-Hoc wifi hotspot but that was a bust, and so was USB tethering.
Now I mostly just use it as a spare AP or Wifi client/bridge.
My experience with the TP-Link MR3040, WISP mode especially, has left me with a couple questions not mentioned in the article.
When operating in WISP mode, are any of these routers able to broadcast their own SSID when NOT associated with a Hotspot?
If so under what circumstances?
Do any of these routers support automatic SSID roaming?
(Ex: hotel uses the SSID "GuestWiFi" on all floors/access points, can you configure it once from your room and still have a connection in the lobby without reconfiguration)
The MR3040 only transmits its own SSID after a successful connection to the Hotspot AP or after a reset to factory defaults.
In some cases I've still had a wifi connection to the travel router when leaving range of the target Hostspot. At other times I've been completely unable to connect to the travel router over wifi, like from a cold boot using the previous configuration.
The MR3040 requires the BSSID (MAC address) of the Hotspot AP you want to connect to. IF you move the router to a different floor/room you have to manually reconfigure.
This becomes a big problem if you only have wifi connected devices (tablet(s) and smartphone(s)) or when it's inconvenient to pull out a laptop to reconfigure over LAN. It gets even worse when you consider how long it takes to reconfigure, 2 to 3 minutes was the norm in my case.
Basically I'm wondering if these two problems are unique to the TP-Link MR3040 or if its a problem with how WISP mode is being implemented.