I have the Thunderbolt and I've not had any of the issues others have. I have another post about recent, minor issues since the Gingerbread update, but those are minor.
One of the issues I had since the Gingerbread update I believe I've found the root cause, at least in my case, and would like some others to look into this as well if possible.
My theory is that the antena on the stock battery cover is not sufficient. The antena in the Trident case is superior and once the phone is connected to an antena that is good enough it is able to maintain a solid 4G connection (in a 4G area) (I live and work close to I90 in Bellevue).
Does anyone know any tricks to improve the antena on the stock battery cover that could be tried? Tinfoil, extra copper sheeting, something that will not harm the phone but will increase the antena with the stock battery cover?
I believe a better antena in the battery cover would improve the reception and connection (3G/4G) of the Thunderbolt and possibly resolve some of the issues people are having with there phones.
Please, if your not willing to destroy your phone or don't know what your doing, please do not put mettle in your phone. I'm sure there are some people on this board that are knowledgable in electronics that could test this theory out and report the findings as well as suggest safe methods to do this (if it truely works).
I've had absolutely no problem with my standard battery door or the extended, both provide the same signal reception (the 4G LTE radio is in the battery door). Sounds like your standard battery door has a problem. Do the contacts in it look ok? Regardless, it should be under warranty, contact Verizon for a replacement.
I realize this thread is a year old, but I just discovered this.
Short story is that I'm on my 4th TB because of various issues. The last one wouldn't pick up 3g/4g in certain cities, my home, etc... Verizon sent me a replacement and I've had it now for about a week. Tonight I switched to the stock extended battery case b/c I ordered an otterbox and was thinking about getting a rezound battery and keeping the skinny look.
I lost 3g/4g and just had 1x.
So messing around with it I put it back in the Trident Electra Extended Battery Case. It works!
I've taken out 5 times now. It always works in the Trident, but it will NOT work in either the stock skinny or stock extended battery cases.