It?s not a slight difference. It?s a very large difference. But no matter.
You may need to do a hard reset/reboot of your phone/iPad.
Assuming you have a home button this is how it?s done. Hold down the power button until you see the ?Slide to power off?.
Power it off.
Press the home button and do not release it. Then press the power button and hold it down. Hold both buttons down until the Apple logo shows twice. When you see it the second time release both buttons. It will boot up.
Another thing to try is to ?forget? the wireless networks you can?t connect to.
Click on the ?i? to the right of the network name. Then click on ?Forget this network?.
If that doesn?t work ask the network owner to reboot their access point, router, or whatever.
Good luck.