I attempted a version of that with the original MiFi 3G router - worked fairly well, but e battery in them is not huge and they also turn themselves off when they deem fit- generally due to inactivity. This wouldn't be an issue if you didn't then need to turn them back on manually- dig it out of your bag and go through the right sequence of button pushing. Obviously no good for inbound stuff like email if you need it in real time if you see what I mean. You may be able to change this in the settings of course but that'd muller the battery faster.
I attempted a version of that with the original MiFi 3G router - worked fairly well, but e battery in them is not huge and they also turn themselves off when they deem fit- generally due to inactivity. This wouldn't be an issue if you didn't then need to turn them back on manually- dig it out of your bag and go through the right sequence of button pushing. Obviously no good for inbound stuff like email if you need it in real time if you see what I mean. You may be able to change this in the settings of course but that'd muller the battery faster.