I do have a question. My phone never shows the right signal it always seems two bars off or so. It's rather annoying to look and see no bars but yet I can still go online and make calls without issue.
What can I do to fix this?
That sounds like it may be rom related. What rom are you using? Have you been on that one the whole time that this issue has persisted?
Sent from my Galaxy Nexus
It's been like that since I have had the phone, they even sent me a 2nd one because of the issue but it had the same problem so I sent it back. I have put liquid smooth JB on since then and the issue persist.
Wasn't this the same issue the phone had when it came out? I though Verizon and Samsung were have suppose to fix this.
I am using the latest JB radio.
i didnt see this ask, but how do i
2. Its is VERY important that you check and match the md5 sum before flashing.
how do i find MD5 on my phone?
Anyone confirm these radio match the official ones that are dropping today via the official release? I want to stay with CM10 but have the updated radios.
Thanks.
i didnt see this ask, but how do i
2. Its is VERY important that you check and match the md5 sum before flashing.
how do i find MD5 on my phone?
This. Anyone checked to see if the radios in the official release are the same as the leaked ones? The leaked ones have been causing more trouble than the 4.0.4 ones did.
I checked the CDMA radio, and the bootloader. The update didn't have a complete LTE radio file, just an update file to patch the previous LTE radio.
The CDMA radio is identical to the one that was leaked a little while ago. The bootloader is identical to the leaked version (which is also identical to the official bootloader for maguro).
Sent from my Galaxy Nexus using Tapatalk 2
Nice, hopefully someone can find a way to get that LTE patch to us without having to flash the stock rom. LTE is the only thing I'm having trouble with.
Although I haven't yet confirmed it, I would be surprised if the LTE radio in the official update is any different from the LTE radio that was leaked a few weeks back. Are you already using those leaked radios?
Sent from my Galaxy Nexus using Tapatalk 2
Here you go. The attached CWM-flashable file patches the IMM76K LTE radio to the new version, and flashes the new CDMA radio.Nice, hopefully someone can find a way to get that LTE patch to us without having to flash the stock rom. LTE is the only thing I'm having trouble with.
SAR: Head: .63 W/kg ; Body .88 W/kg , Product Specific Use: 1.01 W/kg, Simultaneous Transmission: 1.39 W/kg - (max allowed by the FCC is 1.6 W/kg)
The LTE signal strength level is the smaller one
between lte rsrp level and lte snr level if both
rsrp and snr are valid.
The lte snr mapping are
Four bars: SNR >= 45
Three bars: 10 <= SNR < 45
Two bars: -30 <= SNR < 10
One bars: SNR < -30
No bars: No Service
Reference signal received power (RSRP), is defined as the linear average over the power contributions in Watts of the resource elements that carry cell-specific reference signals within the considered measurement frequency bandwidth. Used to measure the signal of your LTE (GSM/4g) connection. In short, it's what's used to determine the best cell tower your LTE device can connect to at the given time. Anything below say -80db is considered pretty good and you're pretty close to a tower. -80db to -90db is average what you should expect most of the time. -90db or above and you're probably in an "extended network" area for LTE and getting close to a likely handoff. -105db and above you would be likely to see a handoff to 3G if your signal does not get better.
Throughput for your connection measured with LTE is estimated to decline between 30-50% if your signal goes from -75db to -90db for RSRP. Above -95db and your throughput dramatically drops. At around -108db and worse, your throughput for download drops to nearly 3G rates or worse. Note that this doesn't exactly represent how strong your signal is, just the potential of how efficiently it will send that data.
"But why can I have a super awesome RSRP signal and still my download/upload speeds are not that good (or why is it still sometimes good when RSRP is low)?"
Because it's only measuring the efficiency between you and the tower, not the rest of the network or the end source (the website). There are many network hops along the way to the destination and some may also handle connections inefficiently. The more hops, the slower the connection generally is.
However, it does also represent the greater likelihood that your connection will drop more packets of data that need to be retransmitted and thus not only slowing your connection but also causing it to have to work harder and draining more battery when it's actively downloading/uploading. That's why having it hand off is for the best than fighting it to stay on LTE. This is most likely why people always complained about the Thunderbolt having such poor battery life as no one ever saw what their RSRP was on it, only their RSSI like all other Gingerbread devices.
echo 4 > /sys/module/tcp_cubic/parameters/hystart_low_window
The thing is, the radio firmware is closed source, so unless someone works for Samsung, no one knows what changes they've made.Thank you for the information you provided - One question that I had that I didnt seem to notice an answer for.
When a carrier updates the Radio's firmware what are they actually changing / adding / removing that we would need an update. If its just the values to show us bars why so many radio updates.... if it has no effect on speed or signal what is happening when they update radio's.
Not really. The radio firmware that you are flashing is just that: firmware for the modem chip. It is not the "driver" that interfaces between Android and the modem.So a new radio is really just an updated driver for the hardware radio?
Sent from my Galaxy Nexus using xda premium