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
Related
I know its kind of against how cellular is designed to work but I am in a situation where a sprint signal is only barely(0 bars) available and it decides to roam (with the triangle) to a uscellular signal. The problem is that its constantly trying to stay on the sprint signal, realizing that the connection isn't good enough and goes back to the uscellular signal and is just killing performance and battery. Is there any prl update or fix I can make with the evo to just stay on the uscc signal and forget about the crappy sprint signal at this location instead of hopping between the two? Ideally I'd like something automatic but I would even settle for a toggle. The uscellular signal is a repeater that was installed at my workplace. For example, in battery status my evo; the cell standby is at 39%
I am having the EXACT same issue in my office. The repeater signal in my office (850 MHz so it only repeats Verizon / AT&T / T-Mobile) is -70 dBm (full bars on my phone). The Sprint signal from outside through the foot thick cement walls is -102 or worse dBm (aka 1-0 bars). Why the hell will the phone not consistently stay on the higher power signal??
The techknowfile trick is NOT the solution to this problem. This seems like a problem with the phone itself - the whole point of a multi-band phone with free roaming is it should always pick the best signal (in my opinion).
I tried the techknowfile trick as well with no luck. Maybe a different prl? I used the 40060.prl file suggested.
Hi !
I recently purchased a S5, SM-G900F model, i'm in europe and i'm using Vodafone as a mobile carrier.
today i saw that i was only getting 1 bar and sometimes didn't show any bar at all,I went to settings and my signal strenght was at -122dbm 22 ASU, connection type as LTE, my mobile data was off.
i was afraid i had no connectivity at all and i picked another phone and i voice called my S5, i was able to make the voice call successfully and my bars went from almost none to 4-5 bars, signal strenght was at -79dbm and surprisingly it didn't drop to HSPA or UMTS.
I thought the most common behaviour for the instantly signal boost was to drop to 3G, but it didn't happen, connection type was at LTE and for long time.
I must say i was at the same place from almost an hour and it didn't boost until i made the voice call.
My question is, can a carrier be able to "keep" a mobile phone at small amount of cell towers and boost signal up with some voice call activity or mobile data traffic ?
Thanks and sorry for my poor english
Albef said:
Hi !
I recently purchased a S5, SM-G900F model, i'm in europe and i'm using Vodafone as a mobile carrier.
today i saw that i was only getting 1 bar and sometimes didn't show any bar at all,I went to settings and my signal strenght was at -122dbm 22 ASU, connection type as LTE, my mobile data was off.
i was afraid i had no connectivity at all and i picked another phone and i voice called my S5, i was able to make the voice call successfully and my bars went from almost none to 4-5 bars, signal strenght was at -79dbm and surprisingly it didn't drop to HSPA or UMTS.
I thought the most common behaviour for the instantly signal boost was to drop to 3G, but it didn't happen, connection type was at LTE and for long time.
I must say i was at the same place from almost an hour and it didn't boost until i made the voice call.
My question is, can a carrier be able to "keep" a mobile phone at small amount of cell towers and boost signal up with some voice call activity or mobile data traffic ?
Thanks and sorry for my poor english
Click to expand...
Click to collapse
1- 3G signal and LTE signal are different and separately. Some reasons that may keep your phone not drop to 3G:
a) 3G signal at that time is weaker than LTE
b) Your carrier can set a policy/algorithm of how a phone switch between 3G/LTE signal
c) Check your network settings in Settings > More networks > Mobile networks > Network mode?
2- Regarding to your question, I can say that the carrier can not have such ability.
Hello,
I have a huge problem with my Galaxy S5 SM-G900F. I bought it abroad and when I used it for the first time in my country I saw, that there is a problem with 4G/WCDMA connection. When I put my sim card to the phone and set all the preferences in mobile connection menu to "Auto" there is no possibility to call or to recieve calls (even if i saw signal strength meter showing some marks). I can only recieve and making call when I set "only 2G" option and manually select my network. But signal is also very poor.
What I have checked yet:
1. Other sim also doesn't work good.
2. After *#06# i saw my IMEI and it is the same under the battery and on the box (doesn't start from "00") so i think that it is not missed (efs folder).
3. Change firmware with KIES and ODIN for the other version - no changes. Also flash some other "modem" files with Odin with no success in better signal.
4. When im on the free air the signal strength is even at maximum level, but immidiately after going to my house - there is no signal. I saw also, that when im in the city i can connect with 2G network (only), but when im on a village there is no signal at all (even 2G...)
Do you have any ideas what can be wrong? Is this hardware failure? Maybe something with antenna? What should I do before going to gsm service center? Maybe i should change kernel and try some of the custom roms?
Thank you for your help.
regards
Mario
Hi everyone,
I already looked for an answer in the forum but nothing conclusive.
My moto g4 play loses signal during calls. The sim card is 3G and so I changed the network manually to 3g on the phone. However the problem continues and I think it even got worse. It happens especially when I'm moving, in the car, etc.
Is there any real solution for this problem? I have seen many users complaining but I did not realize if there was a solution or not.
Can you help me?
Thank you
Since the SIM is 3G, I'm going to assume the network you're using is GSM (ATT/Tmo). It is possible that the cell towers in your area operate on a specific type of GSM frequency, and your signal loss is due to the phone trying to connect to towers not supported by your carrier. If a call drops again, check the Roaming status of your phone in Settings and see what turns up.
Also, it seems odd that you would have to change the network settings at all. Even if the phone is set to prioritize LTE, it should automatically detect the 3G signal and adjust accordingly.
Like the title says, the H910 connects to any network when the selected/preferred network is not available or has low signal. It doesn't matter if you manually select a network, if the signal goes very low it will connect to some other network.
The result is that you see "bars" but is not connected to the intended network and you may not realize that you are out-of-service. With an AT&T simcard you cannot select a network but even when traveling with a foreign sim (where the network selection is available) is still doing that.
Also, when is connected to the other network, you don't see the network name and if you try to make a call you get the "emergency calls only" message.
Probably this is considered a safety feature. Is there a way to turn this behavior off? I want my phone to be out-of-service if there is no signal. Especially since the signal at my home is very marginal lately and I would like to know whether I have service or not (at the moment I assume that if I see more than 2 bars that I don't have service).