why my samsung galaxy tab s is not catching enough wifi even standing right next to the wifi modem.

A

AC Question

I have samsung galaxy tab s. it's been barely one year, since i have it. it always worked fine but from few week, it's not catching enough wifi. i thought i need to update the software to get it fixed. then i updated my software and it was catching wifi as normal. but after two-three days, it had same problem. can you please tell me what should I do now ?
 

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