Hi, I think it is hard to collect all APN information all over the world, because ISP may change their APN information time to time. I think your problem could be solved if you get APN information...

Maybe it is because a bad wireless environment of 2.4G.

You are so creative:D, I don't think it can be used that way.

You can reset your 5360 ( http://www.tp-link.com/en/faq-619.html), then the user and password would be changed to default setting( you can find them in the backboard of your 5350)

Hi, I think it is nothing to do with your MiFi, I think it is because your ISP doesn't support this function. (As far as I know, a device can support ussd codes if it can send short message. )

A SOHO Router is not enough, you need a SMB router and AP for networking.