Congratulations on getting the new bionic! That is such a great device! As far as increasing your 4g signal inside, at this time we do not offer any accessories that would help with this. If you need further support and info with 4g click here for our website. I hope this helps. Thanks.
This may help (but it is $249.99). Verizon Wireless Network Extender-
Click on or copy and paste the link.
I live in an area that has always had poor cell reception, especially in my home. In regards to 4G I am told that I am currently in a solid 4g zone however...I am caught between a 3G and 4G tower. This causes me to go in and out of 4G service. Since I installed the extender I now have 4 bars of reception almost always in 3G and sometimes 4G. This was NOT possible before i installed the extender.