hotspot/bluetooth/wifi/timeout

I want to use my iphone's celldata connection to connect Wifi devices to the internet. The wifi hotspot doesn't work for my application because the feature becomes undetectable if a wifi conneciton isn't made in 90 seconds or if all wifi connections are lost for 90 second. I believe this is in order to conserve the iphone battery. I'm trying to think of ways to manage this without having to repeatedly reopen my phones hotspots menu.

I've thought of 3 ways that this theoretically can be done.

1. jail brake the phone and set the phone to constantly broadcast the wifi, I personally don't like this option because if I wated an unrealiable opperating system on my phone I would get an android rather than a jailbroken iphone...

2. Possibly get Apple to modify their software or find an app that gets around this, is there a setting that when the phone is plugged in the hotspot automatically stays detectable? I don't think this is a possibility as I've been searching the web but it seems to me that Apple could impliment something like this as conserving battey life is a non-issue when the phone is plugged in.

3. Use bluetooth and some sort of a bluetooth to wifi adapter box, this seems the most likely solution that I can think of. I've been reading online and it appears that iphone bluetooth connection once turned on stays active indefinately unlike the iphone wifi hotspot. My thought would be to pair that iphone bluetooth to some device that would rebroadcast the signal as wifi. My biggest/ony problem with this idea is that I can't find anyone selling a device that does this.

Adam