It's not the radio, it's a bug within the sprint network. My post on the previous page explains what is happening. Also a few pages back someone posted that sprint confirmed this was the case and that network engineers are looking for a solution.
I'll reiterate here. This is not the fault of the radio. This is the fault of poor deployment of b26/41 alongside existing b25 with working eCSFB. Here is what I believe happens. The phone scans for LTE and connects to LTE on band 26/41 with broken eCSFB. Since eCSFB is broken/not added, the device falls back to 3G because the network tells it to. The radio is built with completed network upgrades in mind, where all bands have eCSFB. The phone behaves correctly for a properly deployed network. Because of the half-upgraded state of the network, Sprint has to tweak the network side to tell the phone to connect to the band with working eCSFB in the case that it finds a band without it.
It also looks like the G2 users are experiencing this http://www.reddit.com/r/Sprint/comments/27kejy/what_is_going_on/
More G2 evidence: http://s4gru.com/index.php?/topic/4886-lg-g2-users-thread/page-245&do=findComment&comment=317751
Sprint forum thread where the issue is confirmed: https://community.sprint.com/baw/mobile/mobile-access.jspa#jive-discussion?content=https%3A%2F%2Fcommunity.sprint.com%2Fbaw%2Fapi%2Fcore%2Fv2%2Fdiscussions%2F162466
Now can we please stop the b****ing about this radio until the network is fixed? I have found that this radio is on par with .15 when the incorrect reporting of signal levels on .15 is taken into account. Throughput on the new radio also seems to be improved across all bands. Once the network side is fixed up I think people will be making a 180 on their thoughts about this radio.
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