Problems with iphone 4 connecting to Wi-Fi?

I've owned my iphone 4 for about 2 months now, and i usually connect to the Wi-Fi at my school, which i have the correct password to. It worked completely fine, with no problems with detection or connection. Recently, my iphone suddenly stopped connecting to the schools Wi-Fi. The network shows up and allows me to enter the password, but the little gray loading circle keeps going and loading. I've made sure my Wi-Fi is on and i've already tried resetting my network settings, which made no difference. I'm sure its just my iphone because my friend's iphones are working fine, and don't have this problem. I can't do anything with the router because it belongs to the school.

You know so many people use school Wi-Fi, it is common that it does not work well some time. You need to buy 4g lte router, it can support many people to use, and the speed is fast.

I would like to recommend you to buy Sierra 754.it is low price but high quality. I have bought one from http://www.4glteway.com. And now this router is promotion on this website, you can see it

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