Help new S3, keep dropping 3g/4g, no internet

[brichi]

So I got a new S3 last night, In my house which usually has decent 2-3 bar coverage with all other phones in my house, With the S3 I get 2 bars 3G (works ridiculously slow to non functional), Sometimes 2 bars 4G (works decent) and sometimes I just see 2 bars but neither 3G or 4G are present and I cant get online.

Anyone else have this issue, it this a known issue? fix possibly?

Here is with 3G:

Here with 4G which occasionally pops up in same spot in house with 2 bars (no bars in pic but works:

then I get neither 3g or 4g:

which leads to this!!

 

[Deleted User]

Same problem as mine had. Returned it and awaiting the next greatest phone. Some had bad sim cards though.