Why does the 3G connection drop issue happen on all Verizon 4G LTE handsets?

OK, after having reviewed the Samsung DROID Charge, reviewing and owning a DROID BIONIC, and hearing from many Thunderbolt users, it seems like one problem is common to all Verizon 4G handsets: a dropping 3G data connection. So far, I've observed the following:

My BIONIC often refuses to get a 3G data connection back when switching from Wi-Fi or 4G back to 3G. If I switch to Airplane Mode and back, sometimes I'll get the 3G connection back, sometimes I won't. In the About Phone -> Status menu, it says the mobile data network is "connecting." Sometimes I end up having to reboot.

Additionally, when attempting to use the phone in CDMA-only mode, the phone seems to decide to drop its 3G connection at random and refuse to get it back - even on reboot the phone is slow to acquire signal. I noticed a similar problem on the DROID Charge.

Is there any theory as to why this is happening? Do all Verizon's LTE phones share a common chipset model? Because it sounds to me like whoever makes the chipset is doing a real bang-up job of shipping phones with near-defective radios or radio firmware. As it appears to happen across three different manufacturers, the buck falls on Verizon and their LTE chip partner. I'm frankly getting very, very annoyed with this problem and think it needs some public exposure with good empirical evidence that it happens on all LTE handsets on Verizon.

So, I'm asking for your assistance in that regard as well. Leave a comment about your experiences with Verizon's LTE phones and connection drop issues, with as much detail as possible. Of course, the answer I'm looking for here is as to why this is happening, but I think this is going to be a fairly long ongoing investigation. If you've found a method of fixing or working around this issue on your Android phone, please leave that an an answer as well!

Answer

It seems the issue is network authentication problems caused by Verizon's switch to a UICC SIM-based authentication for both 3G and 4G connections on all of its 4G LTE devices. See this article:

http://www.androidpolice.com/2011/12/19/this-is-why-your-verizon-galaxy-nexus-or-other-4g-lte-vzw-phone-is-losing-data-signal/