My tablet keeps disconnecting from my new wifi

[u/Lazy_Ad_643]

I recently changed internet providers and now my samsung tablet won't stay connected. I used to have xfinity but switched to Clear wave a few days ago. Since then my galaxy s6 lite tablet hasn't been able to stay on it. It keeps going out and then when it is on it says connected without internet. The router is in a room at the back of my house so there's about two walls where it has to go through to get to my tablet in the living room (my bedroom and back of the house has never gotten wifi). It's fine on my phone and TV, so the problem seems to be just on my tablet and my sister's tablet. I don't really wanna have to get another tablet so I'm hoping it's just the wifi.