Repost from thread: http://forum.xda-developers.com/show...=771578&page=3
Hey Guys,
I have a GT-i9000 (Unlocked) and after a few firmware upgrades I have been noticing worse call receptions (more drops) and worse 3G data performance.
For example, I once had near perfect reception and few call drops along my drive home, now (5 firmwares later) I have been dropping calls like my old iPhone (actually worse) and what is more upsetting, yesterday my friends with their iPhones all had signal while I was getting the no service icon.
While i know the Captivate users can use the i9000 kernels (but swapping out the modem file) I wonder if anyone knows if I can use their Captivate modem file (JG8) instead of the one that comes with JM7 to fix my issues with reception and 3g performance .
What functionality will i lose? I travel to Germany often, will that cause issues with 1900Mhz and 2100Mhz bands ?
Is there any other reason that my signal would be so poor?? I really need help with this.....
Is anyone else using an unlocked i9000 on AT&T and having poor voice calls (signal/drops)?
What firmware are you using now? I would like to see if this relates to my issue.
I'm using JPC on my Bell i9000m and am starting to wonder if the reception is not as good as with JH2... I am contemplating using the JH2 modem file with JPC to see if it helps...
Coincidentally, I'll be in the US in a few weeks so I want to ensure I have good reception on AT&T as well.
i am using JM6
Just tried the modem from the the Captivate JG8, it would not even install.
So I am running JM7 now.
I will see how many dropped calls i get today.
JPC stopped booting for me and I am on JM7 as well - I'll post my comparative results as well tomorrow.
kurtkbee said:
Just tried the modem from the the Captivate JG8, it would not even install.
So I am running JM7 now.
I will see how many dropped calls i get today.
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Just did some tests with my wife's iPhone (3gs) and my galaxy s.
Passing the same dead zone and her phone could make calls and mine would fail.
I wonder if i put it on gsm mode only if that would help.
Sent from my GT-I9000 using XDA App
so I have this weird issue and i hope you guys are able to help.
I live in the Netherlands, specifically in Emmen, Drenthe.
A few days ago i changed my network operator from T-Mobile to Vodafone.
I did this because I wasn't very happy with T-Mobile's network, they do reasonably well in the west parts of the Netherlands, but in the East part, not so much. Vodafone seemed a pretty decent alternative.
Now i came across a problem, I study at Stenden, which is in Emmen, and nowhere else but at Stenden (and Drenthe College, another school right next to it) I have no signal. It's not all the time, but pretty much 90% of the time there i'm getting no service.
I have an (almost) 3 jear old GS I-9000, with CM10.1 on it. Seeing as it's so specific, I was really doubting it was because I'm using a custom ROM, nothing like this happened with T-Mobile.
Regardless, I decided to go back to 2.3.6 stock just to be sure, and apparently that fixed it. I'm getting an Edge (E) mobile connection at the points at Stenden and DC, and i can call people normally again.
I find it strange that i'm actually getting an E network anyway, but to think my connection previously was thanks to CM10.1 just seems weird. Not to mention my Phone is once again as slow as Peter Griffin during KisStock
LONG Contextual story, Now my question is this: what's causing this loss of service that's ONLY at college, and am i limited to stock 2.3.6 or can i use another ROM?
Any additional info i need to add?
Edit: FYI, My IMEI should have been fine when i was still on CM10.1, so unless i missed something there, it shouldn't be because of that.
Expired Menthol said:
so I have this weird issue and i hope you guys are able to help.
I live in the Netherlands, specifically in Emmen, Drenthe.
A few days ago i changed my network operator from T-Mobile to Vodafone.
I did this because I wasn't very happy with T-Mobile's network, they do reasonably well in the west parts of the Netherlands, but in the East part, not so much. Vodafone seemed a pretty decent alternative.
Now i came across a problem, I study at Stenden, which is in Emmen, and nowhere else but at Stenden (and Drenthe College, another school right next to it) I have no signal. It's not all the time, but pretty much 90% of the time there i'm getting no service.
I have an (almost) 3 jear old GS I-9000, with CM10.1 on it. Seeing as it's so specific, I was really doubting it was because I'm using a custom ROM, nothing like this happened with T-Mobile.
Regardless, I decided to go back to 2.3.6 stock just to be sure, and apparently that fixed it. I'm getting an Edge (E) mobile connection at the points at Stenden and DC, and i can call people normally again.
I find it strange that i'm actually getting an E network anyway, but to think my connection previously was thanks to CM10.1 just seems weird. Not to mention my Phone is once again as slow as Peter Griffin during KisStock
LONG Contextual story, Now my question is this: what's causing this loss of service that's ONLY at college, and am i limited to stock 2.3.6 or can i use another ROM?
Any additional info i need to add?
Edit: FYI, My IMEI should have been fine when i was still on CM10.1, so unless i missed something there, it shouldn't be because of that.
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Click to collapse
That would have been caused from your modem. Flashing CM10.1 changes your modem to XXJVU (I believe, its been a while since I've used CM10.1) regardless of where you are I think. Try flashing in a modem that's Netherlands specific and see if that fixes your problem.
I think there's a slight chance that its kernel related as well but that's not really likely at all.
So try either flash in a Netherlands specific modem or the same modem as the 2.3.6 version you're running.
Sent from my GT-P7510 using Tapatalk HD
I have to say.... This is a bucket of **** (Aus Optus/Vodafone). I have half the 4g reception than my previous note 5.
It struggles switching frequency it seems. I hope future updates fix this and it's not a hardware issue.
me_ashman said:
I have to say.... This is a bucket of **** (Aus Optus/Vodafone). I have half the 4g reception than my previous note 5.
It struggles switching frequency it seems. I hope future updates fix this and it's not a hardware issue.
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I love the phone but noticed reception isn't as good in certain areas of North Carolina. I'm a T-Mobile user and also previously owned a Note 5. Definitely a difference.
Yeah mate...in places I had reception before I now have none.
I've noticed that my wife's phone will have 1 bar where mine has two, but if I go into settings and look at signal strength, it is exactly the same or even a little better.
Two note 8's had issues
Pre-ordered 1... nicest phone I've ever had until it started showing 'searching for service", ROAM, Emergency calls only... then would go to LTE with full bars, and back again. I went back to my S6 for two days with no problems, they sent me a second one... Fine for a day, then SAME ISSUES... did factory reset on both units... still persisted.. got LG V20 on special and full signal, every day....... Hope Samsung fixes issue and I will try one again.
---------- Post added at 10:54 AM ---------- Previous post was at 10:47 AM ----------
Signal strength is VERY important to me as I live way out in the sticks on the coast. The best reception on any mobile I have owned has been with the old Nokia's. The worst would be HTC. Samsung, LG, Asus, Motorola and Sony all work fine here. I am in part of the county that is notorious for very poor signal strength. I have not had a problem with my Note 8 seems to be fine on Vodafone but if I change to another supplier I get zero signal on all models of mobiles.
On times its not the phone brand but our service provider. My present provider for my TV and ADSL give me about 1Mbps!!!! that's if I get a signal at all. Vodafone hotspot gives me up to 30Mbps. Again it can be the provider more than the phone. I have found Samsung fine but others have not been so fortunate. I doubt its the Note 8 though? There are always lemons though in every brand.
Ryland
which model of Note 8 are you guys experiencing this with?
Many of us Exynos owners have been noticing exceptionally poor reception and data speeds on USA carriers, but in my case I have narrowed it down to a hardware issue. Unplugging the lower antenna PCB has no effect on the poor signal strength, and this started suddenly after about 5 days of use. Out of the box it was amazing, and my download speeds were 30-50% faster than with the Note 5. I'm just waiting for replacement parts to become available so I can get a new board and replace it.
Kalm_Traveler said:
which model of Note 8 are you guys experiencing this with?
Many of us Exynos owners have been noticing exceptionally poor reception and data speeds on USA carriers, but in my case I have narrowed it down to a hardware issue. Unplugging the lower antenna PCB has no effect on the poor signal strength, and this started suddenly after about 5 days of use. Out of the box it was amazing, and my download speeds were 30-50% faster than with the Note 5. I'm just waiting for replacement parts to become available so I can get a new board and replace it.
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I thought the Snap Dragon version was issued in the States and China and the Exynos the rest of the world? PERHAPS the problem could be your carriers are not well suited to the Exynos models only the SD?
I am talking through my ears as I understand zero about such things. Here to learn. :good: Could also be one has purchased a lemon? I dont think its general to the Note 8, as I wrote above mine works very well here in a notoriously bad area of this country running Exynos.
Q; Is it wise to modify your mobile while it still has 12 months warranty? How many people have the skills to perform your modification and why should it be necessary? Your guarantee is now void.
Q; Out of the box you said it was amazing. What changed?
Ryland
Ryland Johnson said:
I thought the Snap Dragon version was issued in the States and China and the Exynos the rest of the world? PERHAPS the problem could be your carriers are not well suited to the Exynos models only the SD?
I am talking through my ears as I understand zero about such things. Here to learn. :good: Could also be one has purchased a lemon? I dont think its general to the Note 8, as I wrote above mine works very well here in a notoriously bad area of this country running Exynos.
Q; Is it wise to modify your mobile while it still has 12 months warranty? How many people have the skills to perform your modification and why should it be necessary? Your guarantee is now void.
Q; Out of the box you said it was amazing. What changed?
Ryland
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I'm no expert by any means, but I have the Note 5 from T-Mobile, which is also an Exynos device. The Exynos Note 8 is essentially just a newer Note 5, newer version of the CPU and modem (both have Shannon modems), and support T-Mobile's LTE bands. I do not believe there is any compatibility issue with the hardware. I definitely could have purchased a lemon, and that's what it seems like. The rest of the phones functions are amazing - it's literally just been issues with the components on that bottom PCB that have been popping up (not just for me, but also others on here, the lower circuit board has LTE antennae, mic, and lower speaker - all of which have had a few complaints of not working or not working properly).
To answer your Qs, my phone is a South Korean model and I live in the USA, so Samsung here will not honor the warranty. I would need to ship it back to Korea if anything. Many people have the skills necessary to replace this board, but it is a pain in the butt due to the rear glass using adhesive from Hades to stick to the frame. It shouldn't be necessary, but Samsung seems to have sent out some phones with faulty usb/antenna boards and it's less of a hassle for me to fix it myself than try to deal with international repairs.
Out of the box was amazing, I had equal LTE signal strength to my Note 5, and download speeds were about 4-6x what they suddenly dropped to after about 5 days of use. At the time, I thought it was due to flashing NEMESIS ROM, but I Odin flashed back to full stock and nothing was 'fixed' . Then, I opened the phone and found that physically applying pressure on one of the LTE antenna connectors in a specific direction made the signal strength jump up to equal my Note 5, and the super fast data speeds returned - as long as I kept pressure applied in that specific direction.
Kalm_Traveler said:
I'm no expert by any means, but I have the Note 5 from T-Mobile, which is also an Exynos device. The Exynos Note 8 is essentially just a newer Note 5, newer version of the CPU and modem (both have Shannon modems), and support T-Mobile's LTE bands. I do not believe there is any compatibility issue with the hardware. I definitely could have purchased a lemon, and that's what it seems like. The rest of the phones functions are amazing - it's literally just been issues with the components on that bottom PCB that have been popping up (not just for me, but also others on here, the lower circuit board has LTE antennae, mic, and lower speaker - all of which have had a few complaints of not working or not working properly).
To answer your Qs, my phone is a South Korean model and I live in the USA, so Samsung here will not honor the warranty. I would need to ship it back to Korea if anything. Many people have the skills necessary to replace this board, but it is a pain in the butt due to the rear glass using adhesive from Hades to stick to the frame. It shouldn't be necessary, but Samsung seems to have sent out some phones with faulty usb/antenna boards and it's less of a hassle for me to fix it myself than try to deal with international repairs.
Out of the box was amazing, I had equal LTE signal strength to my Note 5, and download speeds were about 4-6x what they suddenly dropped to after about 5 days of use. At the time, I thought it was due to flashing NEMESIS ROM, but I Odin flashed back to full stock and nothing was 'fixed' . Then, I opened the phone and found that physically applying pressure on one of the LTE antenna connectors in a specific direction made the signal strength jump up to equal my Note 5, and the super fast data speeds returned - as long as I kept pressure applied in that specific direction.
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Click to collapse
Excuse my ignorance,.but aren't there others on here complaining about LTE speed throughput on there F models also ? When using USA sim cards.
Perhaps it was a faulty batch?
Sent from my SM-N950U using Tapatalk
Limeybastard said:
Excuse my ignorance,.but aren't there others on here complaining about LTE speed throughput on there F models also ? When using USA sim cards.
Perhaps it was a faulty batch?
Sent from my SM-N950U using Tapatalk
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You are correct, F and N models. They are the exact same hardware, and my thought is that a batch of those boards went out that have developed issues very quickly.
I read a post this week but can't find the thread now of course. In it, a user who worked on configuring phones for a large telco or something said that the antenna for each regional model is tuned to the particulars of that specific region. He wasn't just talking about supported bands, etc. It was really about antenna tuning. Ultimately he said this is why he decided to forgo the international Note 8 models in the U.S., even though he badly wanted an Exynos model for custom roms, etc. Now I personally don't know whether there is anything to his claims (and I wish I could find that thread again), but it made sense so I thought I'd mention it here as it could explain the LTE or signal issues. If it's bunk though, then please ignore
sefrcoko said:
I read a post this week but can't find the thread now of course. In it, a user who worked on configuring phones for a large telco or something said that the antenna for each regional model is tuned to the particulars of that specific region. He wasn't just talking about supported bands, etc. It was really about antenna tuning. Ultimately he said this is why he decided to forgo the international Note 8 models in the U.S., even though he badly wanted an Exynos model for custom roms, etc. Now I personally don't know whether there is anything to his claims (and I wish I could find that thread again), but it made sense so I thought I'd mention it here as it could explain the LTE or signal issues. If it's bunk though, then please ignore
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Click to collapse
the bands are the frequencies that are 'tuned' for. Any given piece of metal is better at picking up certain frequencies than others, depending on how long it is, how thick it is, if there are any coils etc.
This is why region doesn't matter in and of itself - if a specific band is supported, the phone can operate with that band/frequency regardless of which country it was manufactured for. Where a person might run into problems is if their carrier uses a given LTE band or group of them and the international phone model they want does not support those bands.
In our case, the Exynos Note 8 has all the main bands we need for T-Mobile and AT&T here in the USA.
Hey guys
I'm currently in the possession of the OnePlus 5 and this phone has a bad 3G reception in germany. On 3G the data often has some dropouts which is very annoying (take a look at https://forum.xda-developers.com/oneplus-5/how-to/oneplus-5-issue-h-network-t3658071)
I'm thinking about changing to the Mi 9 and i want to know about the 3G reception of this phone.
Does this phone has any problems or dropouts?
Nope, but i'm in UK!!!!
Blumdum said:
Hey guys
I'm currently in the possession of the OnePlus 5 and this phone has a bad 3G reception in germany. On 3G the data often has some dropouts which is very annoying (take a look at https://forum.xda-developers.com/oneplus-5/how-to/oneplus-5-issue-h-network-t3658071)
I'm thinking about changing to the Mi 9 and i want to know about the 3G reception of this phone.
Does this phone has any problems or dropouts?
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Click to collapse
That's a very hard question to answer, since various telecom operators may give different results.
I did not have troubles like that with my OP3 (in HK), and I moved since to Switzerland, and was using an OP6 until recently (gave it to my wife), now I use the Mi9 and the reception quality seems about the same with the same SIM card, going to the same places, etc.
I never experienced the data connection cut so it's hard to be 100% sure...
Hi, I got a Xperia 1 II, and it works fairly well but the reception is very unreliable. I am wondering if I install a different ROM and stop using the OEM ROM, will I get better reception? I am in Australia and my carrier gets 5G yet I have never seen 5G on this phone... Will a different ROM get it to work? Or what if I use a different modem firmware?
Thanks.
Bump
Bump
Danielandg said:
Hi, I got a Xperia 1 II, and it works fairly well but the reception is very unreliable. I am wondering if I install a different ROM and stop using the OEM ROM, will I get better reception? I am in Australia and my carrier gets 5G yet I have never seen 5G on this phone... Will a different ROM get it to work? Or what if I use a different modem firmware?
Thanks.
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Hi,
I also got X1ii AU, it also has the same problem, only 2 network bars showing.. 4G calling is working,
But if u check signal strength on sim status inside settings-about phone, there is normal figures between -88dbm to -92dbm.