Please reply and let me know if you are still having problems getting connected to 4G.
When you rebooted, did you remove the battery & even the SIM card? Once you removed & reinserted, what happened?
Is there anyone else with or around you that may also have a 4G device from Verizon? If so, are they also having problems picking up 4G?
Have you also tried these steps from the phone?
(Two work arounds provided to us from HTC are listed below)
1. From the home screen, select Applications.
2. Select Settings.
3. Select Wireless & network.
4. Select Mobile networks.
5. Select Use packet data.
Enabled when a orange check mark is present.
The next is..,
1. From the home screen, select and hold the status bar (located at the top of the display).
2. Drag the window shade to the bottom of the display.
3. Select Mobile data.
Enabled when a orange indicator is present
Let me know what happens. I want to ensure you are able to continue to Rule The Air with your 4G device.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
I would just leave it on 3G, you will end up locking on to that anyway once if you get the 4G and the infamous Verizon routing disaster happens every 15-30 minutes....
I also have the same problem: my HTC Thunderbolt will have a good 4G signal, which will randomly drop. All Voice, Text and Data will cease working without any warning. After determining this failure, I can go into
Wireless & networks >
Mobile network will show "Connection failed"
I can uncheck and re-check the "Mobile network" option, and will get the subtext 'Connected' and the phone will begin to work as it should.
However the problem will return eventually.
Frequency of problem: dozens of times per day
Location of Problem: all locations (including in areas with strong to weak dBm (coverage))
Attempts to Resolve: Restart phone. power cycle phone. battery pull. remove memory & SIM cards. Update software. Wipe phone. Probably next going to exchange for a new Tbolt.
(I have tried a variety of solutions. I think the problem is likely native software handling 4G handoff for the phone or for the network. Alternately, my phone hardware.)
A temporary fix is available for the HTC Thunderbolt dropping its 4G connection!
Post containing solution
( http://community.vzw.com/t5/ThunderBolt-by-HTC/Thunderbolt-drops-4G-off-and-on/m-p/630690#M7523 )
Props to ChristinaB_VZW Wireless Employee for contributing the "force Rev A" solution. I used it once and currently have had signifigantly less problems.
same thing happens to me....
for the first time, no 3g or 4g internet, voice is clear as day.
called customer service-took batt/sim card out, data roaming checked, toggle between airplane mode, etc.. nothing works
on for like 10min then out for an hour...repeat for a while.
getting pretty tired of it....