IPhone 4S is lagging really badly?

I got my iphone back in november and it was fine at first. It was fast and never lagged but for the past couple days it has been really slow. Whenever I get a text message, my whole phone freezes for like 4-5 seconds and the same thing happens when I send a text. Also my safari and apps have been force closing because it takes them too long to open. I don't have tons of apps and never keep windows open on safari. Any ideas! If this keeps happening I'm thinking of switching back to android.

Hold the home and lock button for a while until the apple appears. It will take a little while so be patient! Hope this helps!

Try clearing the on board memory move everything to.memorycard delete ap you don't use or hardly use try using link2sd (rooted)

You are stupid. Iphones don't have memory cards.

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