Originally Posted by Punk9
Hey guys, Punk9 again.
I live in the UCF area (Orlando FL) and I have LTE signal here. I have around 2-3 bars of service most of the time as well.
Lately I have been getting texts late, and not even receiving phone calls. For example, my gf sent me 6 texts within about an hour, I got all six at once, each with the time stamp of the time she sent them, but I got them all at the same time. She also called twice and nothing rang on my end, but it rang for 30 seconds and went to my voice mail on her end.
Is this a known issue or? I'm running ViperROM for Sprint one max. It was happening when I was stock as well (which is why i didn't post in the ROM thread)
This sounds like a common CSFB issue. All new triband phones, or Spark devices use a new technology called Circuit Switch Fall Back
, which allows the phone to use less battery because it has one radio for everything. When the device connects to LTE, it cuts off connection the 3G network, and essentially loses the ability to send/receive texts/calls. CSFB is the answer to this, however, it is not wholly deployed. CSFB tells the phone via LTE to switch back to 3G to receive phone calls and texts, as well as to send them. Since the technology is not as widely deployed as the amount of users of the new devices, theses issues happen.
A common way to fix this is to stay on 3G only mode, which is a burden. Otherwise hope the Sprint tech is smart enough to know its a Spark phone related issue, and knows how to send a tech out to your area to fix it. Last resort is to wait it out.
Calling Sprint may or may not do anything. I have been experiencing these problems since day one in New York City at my home, and every call to Sprint was answered with a saying that it is an issue with your phone.