We have been using Verizon cellular Internet service with various devices since 2002. Since EVDO has been available, I have seen our phones and USB modems switch between 1x and EVDO many times. When I look at signal strength, the switch has always been related to the strength of the two signals. If the 1x signal is stronger, they flip to that.
We have started spending our summers on the Oregon coast at a location where the 1x signal is almost always better than the EVDO signal. With my USB modem I can force it to EVDO, which gives me much better service in that location.
There seems to be no mechanism for forcing the Droid to EVDO or 1x.
All that is not to say that other factors could be involved. I'm no telecom engineer, so I won't speculate on whether services such as texting force the switch. I know for a fact that relative signal strength does, though.
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Dave Rudisill
Fulltime RVer
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