hi all , before i have redmi note 4 i haven't any problem with sim signal, but now i have redmi note 7 the sim signal ( RIL) is so weak ; is ther a solution ( kernel or vendor or fixs) to increase signal strenth ; i am from Algeria maybe it have different ril configs.
Thanks in advance.
what is the solution to increase sim signal level, or best rom for resolving this.
yes it seems to randomly want to choose signals, i have a solution but requires root.
Try changing your Sim settings to 3G instead. It'll switch to HSPA bands which could be stronger vs LTE and similar speeds as well.
Try network cell info lite app in the play store and report back with both your LTE and HSPA dB readings.
Good LTE readings should be in the green 70-99 range.
Good HSPA should be green 60 -90 range
Related
I have a problem and think it is related to the antenna my Galaxy Pocket. My phone detects only 2G networks with strong signals. In the 3G signal is always around-85dBm 10 asu 113dBm 9asu Until then it goes back to 2G when 3G is on varies the signal level and is impossible to use mobile internet or make calls. Network modes that appear to me are HSDPA (which works very badly), EDGE and GPRS, tested with all operators in my country (Vivo, Claro, TIM and Hi). All with the same results in terms of signal. Already updated the stock ROM, installed customs and nothing resolved. I have a Defy Mini XT320 signal and this unit is very good the internet is fast. What do I do?
Assistance...
Luiz Paulo Damaceno said:
I have a problem and think it is related to the antenna my Galaxy Pocket. My phone detects only 2G networks with strong signals. In the 3G signal is always around-85dBm 10 asu 113dBm 9asu Until then it goes back to 2G when 3G is on varies the signal level and is impossible to use mobile internet or make calls. Network modes that appear to me are HSDPA (which works very badly), EDGE and GPRS, tested with all operators in my country (Vivo, Claro, TIM and Hi). All with the same results in terms of signal. Already updated the stock ROM, installed customs and nothing resolved. I have a Defy Mini XT320 signal and this unit is very good the internet is fast. What do I do?
Click to expand...
Click to collapse
Did you try the tecnical assistance?
I have VS980 outside the US, set to GSM/UMTS and my signal goes as height as 2/5 most of the time, rarely 3/5 and the highest I've seen in 4 days was 4/5, all in different places. I experience no disconnections and the network speed is just ok , goes up to 5700down/1300up which is almost regular speed I was used to get with my xiaomi mi2s.
So can it be just a wrong presentation of the signal strength when on GSM network?
Can I flash radio from D802?
Thanks.
I have GSM Unlocked Samsung l720 , currently its running 4.4.2 with base band VPUFNG2.
I have having good GSM signal out door , but indoor my GSM signal level gets under a lot of fluctuation and even goes to no network signal multiple times in a day.
I have tried other network sim cards as well , but the problem remains the same, while network signal on my other mobiles at the same location are up to mark.
I need help on it , if there is any flash-able modem file which can make my gsm signal stronger , also is it possible to flash i9500 modem file on l720.
Thanks in advance.
I have a problem with the Samsung Galaxy S8 unlocked, carrier-free USA version (SM-G950U1) and the way it interacts (or fails to interact) with certain cell towers/bands/frequencies while trying to connect with T-Mobile.
Inside some large buildings, it doesn't get a signal. What *appears* to be happening, based on my limited knowledge of these things, is that the phone can't see/maintain a connection to any LTE or GSM signals, and keeps defaulting to CDMA.
Other phones DO have service at the same time and place, *including* my Galaxy S5 with the same T-Mobile sim card that I'm trying to use in my S8. I can take my S8 outside (or into many other buildings) and it maintains an LTE/GSM signal without problems. The trouble spots are consistent, so this is annoying to debug because I have to go to certain places, but once I'm there, the problem reliably happens.
Since my old phone with my current sim card still works in these same locations, I don't think it's exclusively a carrier problem, and is either a) something wrong with the phone, or b) something wrong with the interaction between T-Mobile and the unlocked Galaxy S8. Because I can't find discussion anywhere online about option B, I've been assuming it was option A. However, I've tested 2 S8's so far and both had the same problem, so now I'm not sure what to think. I've just picked up a third S8 that I'll test in the next few days.
All the S8's are running the latest stock Touchwiz software and are not rooted.
Does anyone know enough about these things to help? I'm attaching screenshots of info from the app LTE Discovery - all tests are using the same T-Mobile sim card except in one case, as noted:
** (QA) S8 at location "V", with no LTE and a HSPA+ signal -103 dBm. It appears to be connecting to/only see CDMA towers.
** (QB) S8 at "V", with no LTE and a GSM (?) signal -97 dBm.
** (QC) S8 at "V", with a VERIZON sim card that I briefly borrowed to test with, with LTE on band 13 with -108 dBm and a CDMA 1xRTT signal at -96 dBm.
** (QD) S5 at "V", an LTE signal on band 4 with -113 dBm and GSM -69 dBm.
** (QE) S8 at location "P", with no LTE and a HSPA+ signal -99 dBm. It appears to be connecting to/only see CDMA towers.
** (QF) S8 at "P", with no LTE and a CDMA (?) signal -89 dBm.
** (QG) S8 at "P", with an LTE signal on band 2 (through a CDMA tower?) at -130 dBm. The cell radio is "connecting" and it sees a bunch of LTE and GSM towers that it apparently decides not to use...
** (QH) S5 at "P", an LTE signal on band 4 with -113 dBm and GSM -75 dBm.
What on earth is going on? Anyone else experiencing this? Your insights are appreciated!
(This is a follow up to the thread I posted at https://forum.xda-developers.com/galaxy-s8/help/s8-signal-loss-buildings-phones-4g-lte-t3660313)
(Also possibly of interest, discussion of this same question at https://www.reddit.com/r/tmobile/comments/7351hb/galaxy_s8_unlocked_smg950u_not_maintaining_tmo/)
dovesong said:
I have a problem with the Samsung Galaxy S8 unlocked USA version (SM-G950U) and the way it interacts (or fails to interact) with certain cell towers/bands/frequencies while trying to connect with T-Mobile.
Inside some large buildings, it doesn't get a signal. What *appears* to be happening, based on my limited knowledge of these things, is that the phone can't see/maintain a connection to any LTE or GSM signals, and keeps defaulting to CDMA.
Other phones DO have service at the same time and place, *including* my Galaxy S5 with the same T-Mobile sim card that I'm trying to use in my S8. I can take my S8 outside (or into many other buildings) and it maintains an LTE/GSM signal without problems. The trouble spots are consistent, so this is annoying to debug because I have to go to certain places, but once I'm there, the problem reliably happens.
Since my old phone with my current sim card still works in these same locations, I don't think it's exclusively a carrier problem, and is either a) something wrong with the phone, or b) something wrong with the interaction between T-Mobile and the unlocked Galaxy S8. Because I can't find discussion anywhere online about option B, I've been assuming it was option A. However, I've tested 2 S8's so far and both had the same problem, so now I'm not sure what to think. I've just picked up a third S8 that I'll test in the next few days.
All the S8's are running the latest stock Touchwiz software and are not rooted.
Does anyone know enough about these things to help? I'm attaching screenshots of info from the app LTE Discovery - all tests are using the same T-Mobile sim card except in one case, as noted:
** (QA) S8 at location "V", with no LTE and a HSPA+ signal -103 dBm. It appears to be connecting to/only see CDMA towers.
** (QB) S8 at "V", with no LTE and a GSM (?) signal -97 dBm.
** (QC) S8 at "V", with a VERIZON sim card that I briefly borrowed to test with, with LTE on band 13 with -108 dBm and a CDMA 1xRTT signal at -96 dBm.
** (QD) S5 at "V", an LTE signal on band 4 with -113 dBm and GSM -69 dBm.
** (QE) S8 at location "P", with no LTE and a HSPA+ signal -99 dBm. It appears to be connecting to/only see CDMA towers.
** (QF) S8 at "P", with no LTE and a CDMA (?) signal -89 dBm.
** (QG) S8 at "P", with an LTE signal on band 2 (through a CDMA tower?) at -130 dBm. The cell radio is "connecting" and it sees a bunch of LTE and GSM towers that it apparently decides not to use...
** (QH) S5 at "P", an LTE signal on band 4 with -113 dBm and GSM -75 dBm.
What on earth is going on? Anyone else experiencing this? Your insights are appreciated!
Click to expand...
Click to collapse
US Unlocked S8's model # is: G950U1. I have the same model and used it on T-Mobile for about 2 months before flashing firmware on it. My work building has Band 4 and Band 12. There are spots in the building where phone would have low Band 4 signal, then would connect to Band 12. I haven't seen any weird behavior of the signal in my building. The reason I keep bringing my building as an example is because it is very tricking for phones without band 12 to properly have signal there, at least on T-Mobile.(haven't checked other carriers)
Then I flashed my phone with T-Mobile firmware and continue to have coverage as I did when my phone was running an unlocked firmware. You could flash your phone with T-Mobile's firmware which will give you all T-Mobile features, but will also give you few of their apps, but they can be disabled.
If you decide to flash the phone, use "flashing standard firmware" option - https://forum.xda-developers.com/galaxy-s8/how-to/snap-guide-flashing-standard-fw-carrier-t3625817
Charkatak said:
US Unlocked S8's model # is: G950U1. I have the same model and used it on T-Mobile for about 2 months before flashing firmware on it. My work building has Band 4 and Band 12. There are spots in the building where phone would have low Band 4 signal, then would connect to Band 12. I haven't seen any weird behavior of the signal in my building. The reason I keep bringing my building as an example is because it is very tricking for phones without band 12 to properly have signal there, at least on T-Mobile.(haven't checked other carriers)
Then I flashed my phone with T-Mobile firmware and continue to have coverage as I did when my phone was running an unlocked firmware. You could flash your phone with T-Mobile's firmware which will give you all T-Mobile features, but will also give you few of their apps, but they can be disabled.
If you decide to flash the phone, use "flashing standard firmware" option - https://forum.xda-developers.com/galaxy-s8/how-to/snap-guide-flashing-standard-fw-carrier-t3625817
Click to expand...
Click to collapse
Thank you! So you think the S8 isn't properly connecting to band 4 or 12, and that could be the problem? It does look like it might only ever be connecting to bands 2 and 4, so if it doesn't by default connect to band 12, maybe that is the problem. Although my S5 connects to band 4 in both those spots, but my S8 doesn't, so I don't know if band 12 is really the issue.
I have the unlocked AQH3 firmware and bootloader installed now - I assume this is the "XAA" version? If I try flashing the T-Mobile version of that same firmware release, should I expect that to change something about the network settings/capabilities that I can't otherwise change? And this does not require root, correct?
Thanks again!
dovesong said:
Thank you! So you think the S8 isn't properly connecting to band 4 or 12, and that could be the problem? It does look like it might only ever be connecting to bands 2 and 4, so if it doesn't by default connect to band 12, maybe that is the problem. Although my S5 connects to band 4 in both those spots, but my S8 doesn't, so I don't know if band 12 is really the issue.
I have the unlocked AQH3 firmware and bootloader installed now - I assume this is the "XAA" version? If I try flashing the T-Mobile version of that same firmware release, should I expect that to change something about the network settings/capabilities that I can't otherwise change? And this does not require root, correct?
Thanks again!
Click to expand...
Click to collapse
Root isn't needed.
I don't really know what changes it will bring as far as networking capabilities, but if it is the T-Mobile firmware, then it most likely be very well suited for its network. Unlocked model still connected to band 12 and I don't know if your city or place has band 12, but you can easily find out by using LTE Discovery app and it will show you. Flashing to T-Mobile firmware gave me the ability to place "video call, have advanced massaging and has DIGITS service build into the phone app" + some people also mention that 4x4 MIMO and 256 QAM are also supported on T-Mobile's firmware + I have read stories that they got better signal as well.
An update, for anyone else having this issue: my best theory has been that the phone was prioritizing non-LTE signals over a weak LTE signal. How I fixed it the first time: enter the BAND service mode via the native dialer by dialing *#2263# (2263 spells BAND). Clear all bands, then select all LTE bands (ONLY LTE) and apply the changes. This forces the phone to use only LTE signals, no matter their strength. It's worth noting that you may need to alter this when traveling through areas without LTE service, by re-entering the menu and selecting all bands and applying the changes.
My phone *just* updated to Oreo, and the problem may be back, although I haven't had a chance to thoroughly test or debug it, yet...
I have been using jio 4g for past 2yrs. The internet connection was good. But for the past 6 months I am facing frequent disconnection of the internet. So I go into flight mode activate and deactivate it again the net connection will be good for a minute and then it drops again to b/S. Frustrated I changed the SIM. But same problem. The bio customer care says it to update firmware! Which was not available and at last they told me to get the mobile serviced. So I swapped the SIM to another mobile and checked. There was no problem in that mobile. Please help me. Whether it is due to SIM or the band problem with mobile. I am using a stock firmware
Ps. Even I resetted, rooted
Set the network type or RAT or network mode to LTE (4G) only, then the phone should stay on the signal even when the signal is low for a second, around -120 rsrp (signal), specifically it should normally follow the parameters sent by the network: qRxLevMin (it is half the rsrp), qQualMin (sometimes, it is the signal quality), sNonIntraSearch, ThreshServingLow (both are ranges around qrxlevmin, one for entry threshservinghigh, one for exit). These parameters should nornally not be followed with LTE (4G) only. But only if the signal drops below the limit for a second. Else, it is a waste of resources, both for you (battery, etc), and the network, though the network can deprioritize cell edge (low signal) users.
To do so, there are extended network modes (for sim 1) in a menu that comes with Android, it is called 4636, Testing, Phone info, Device info, etc. There are apps that open 4636 without root, that offer: mode selections, lte only, anything cellular related that opens 4636.
Hold the phone on its top, not its bottom, for testing, the primary reception antenna should be at the bottom for A 2016, you can check this in *#0011#, it is "ant rsrp diff", it is positive when the primary reception antenna is better, negative when the diversity reception antenna is better, the diversity antenna should in most cases power on when the cellular is in use and start measurement, in contrast to the primary that's just switched on.
The signal can be measured in *#0011#, rssi is the signal strength of the frequency, the signal strength of intra freq (same frequency) neighbors (other cell towers etc) may differ slightly anyway because it's missing a decimal point; rsrp (good maybe at least -120, get it closer to -1) is approximately the signal strength of the cell, it is a few antennas in the long rectangular boxes on a cell tower, note that it is the measurement of the reference signal not the data that is being sent to your phone; rsrq(good maybe at least -15, best -1), sinr (good maybe at least 0, best 40), are signal quality. The "registered plmn" is the currently connected operator (mobile country code and mobile network code), if it changes (different compared to the sim), the signal is low! The "PCI" is the currently connected cell, note that there are only ~500 of these, so to identify the cell you can use both PCI and TAC (region), if the pci changes and the signal strength drops, well, the signal dropped and a reselection is made to an inferior cell, which can then drop data... in this case contact your mobile network operator but they might not make changes if it only affects a few users. You may try to lock band/etc to the good cell that sometimes drops in quality for a second but overall better than the neighbour cells.
Here's a short list of scenarios that can cause problems in connectivity, not all.
1: Low signal, plain old low signal. If the phone can't register VoLTE the bands that can be connected to may be restricted on some MNOs.
2. The antenna is closed and this causes low signal.
3. Low signal of the serving cell, the signal of an inferior neighbour cell matches (above parameters!), the phone changes to another antenna on a cell tower, quality drops and so does the connection. On another cell tower or there are 2 antennas on 1 cell tower, for example 1 facing the azimuth 180 degrees, another 270, the phone being in 215 degrees is unfortunate!
4. The antenna is open and receives interference (and reselections, sometimes good) from neighbour cells.
5. Good signal but it has been echoed a bit too much.
6. Reject causes and others, where the connection has been disconnected for some reason. Probably not in this case! It is viewable in *#9900# > Take cp log > copy to internal sdcard. It is in the /internal storage/log/LitmusLog. Scroll down to the reject cause section, those are error codes.
None of these codes/volte are working: The CSC is not applied correctly! Flash stock rom and open the stock recovery or copy /system/csc/...csc.../system/ to /system/etc/.
I do not recommend anything EFS/PIT, making a backup of efs is OK!
Hi,
I am facing the same problem with a7 2016 with JIO sim.
The mobile is purchased in dubai and when insert jio sim in india, was not able to use volte service.
So I flashed official indian rom. Everything is fine except net speed. Net speed between 1-5am is very fine but in day time speed reduces.
Everytime i have to restart data to use net but after a while same problem occurs.
Tried in both sim trays. I am using single sim in mobile.
Pls provide a solution.
Regards
//aftab