Help! Lost 4g after installing extended battery/Door

**kristykat182** · 05-02-2012, 12:31 PM

After having awful battery issues I purchased the extended battery/door from amazon

Amazon.com: Extended Battery/Door for HTC Thunderbolt (Black): Cell Phones & Accessories

The only issue is that I have lost 4g completely. I get 3g just fine. But I miss my 4g. Anyone know of a fix?

**Synycalwon** · 05-02-2012, 12:37 PM

The LTE antenna is in the battery door. Does the new battery door have gold contact points in it? Those are the connections to the antenna. Make sure there is nothing preventing them from making contact to the connection points on the phone itself.

**kristykat182** · 05-02-2012, 12:49 PM

Yes. It does have the gold contact points. And there is nothing blocking it. I cannot figure out what the issue is.

**quarter2five** · 05-02-2012, 03:04 PM

Did you check your Network mode.... my bolt had that problem, switched to CDMA all by itself, instead of LTE/CDMA.

**Synycalwon** · 05-02-2012, 03:15 PM

Originally Posted by quarter2five

Did you check your Network mode.... my bolt had that problem, switched to CDMA all by itself, instead of LTE/CDMA.

Good point, didn't think of that.

The setting is at: Menu, Settings, Wireless & network, Mobile networks, Network Mode. If it's already set to LTE/CDMA, you could try a power down, pull the battery and SIM card for at least five minutes. This will force the phone to reset and re-provision itself on the network when it's powered back on. I'd also try the standard battery door; if it works yet there would appear to be a problem with the new extended door.

**Unobtanium** · 05-02-2012, 03:16 PM

In addition to checking your network mode, make SURE the battery and battery door are seated properly. Even a slight battery door issue will mean no contact with the antennas (LTE requires 2 antennas, something I found out from a Verizon engineer when setting up a couple of routers with USB aircards for a data project at work).