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Sim card and battery drain

Not sure if this has any real correlation but I figure I'd share. Long story short, I had been getting horrible battery life all day at work. Phone wouldn't even charge. After work went to T-Mobile store and had a new sim card placed in the phone and instantly the battery drain disappeared.
I was using the battery widget and noticed drain as much as -750mA. Soon as the new card, -2mA. I had restarted the phone several times already and it never drained this slowly. Only after the new card. Just thought I'd share.
Sent from my LG-P999 using XDA App

kangxi said:
Not sure if this has any real correlation but I figure I'd share. Long story short, I had been getting horrible battery life all day at work. Phone wouldn't even charge. After work went to T-Mobile store and had a new sim card placed in the phone and instantly the battery drain disappeared.
I was using the battery widget and noticed drain as much as -750mA. Soon as the new card, -2mA. I had restarted the phone several times already and it never drained this slowly. Only after the new card. Just thought I'd share.
Sent from my LG-P999 using XDA App
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I might give this a try as well. I got 9 hours today with moderate use. Just web surfing and texting, and about 10 minutes of streaming radio, actually.
I need to know the cause since I only have another 7 days to take it back.
(And yes, I know the battery level readings are messed up, but there's no messing up the fact it was on the charger all night, and then I went from 100% to 1% in 9 hours.)

Interesting. I just used my old sim from my g1. Time to rye three new sim then.
Thanks for the notice!
Sent from my LG-P999 using XDA Premium App

Here is the visual evidence. This is with the phone on the charger. You see many times that it wasn't even charging and at times discharging. The huge green line is after the new sim.
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It's a brand new 4g network doesn't it make sense to get a fresh sim, especially if this is your frist 4g phone.
The sales chick.... wait a second that's a new term "sales chick"
Well the sales chick specifically told me she needed to give me a fresh sim so I would not have any problems with reception.

If I pop in the new sim card will my phone number transfer automatically? I know in europe the phone numbers are locked to the sim card.
Sent from my LG-P999 using XDA App

kangxi said:
Not sure if this has any real correlation but I figure I'd share. Long story short, I had been getting horrible battery life all day at work. Phone wouldn't even charge. After work went to T-Mobile store and had a new sim card placed in the phone and instantly the battery drain disappeared.
I was using the battery widget and noticed drain as much as -750mA. Soon as the new card, -2mA. I had restarted the phone several times already and it never drained this slowly. Only after the new card. Just thought I'd share.
Sent from my LG-P999 using XDA App
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I'm going to do that tomorrow then, i have my sim from my blackberry 9700 then to hd2-g2-now the g2x. I believe i don't have the "4g" sim-card then.

there is no "4g" sim card
there are only newer sims and older sims. older sims have trouble connecting to some of the newer towers, usually if they are over 1 1/2-2yrs old you should probably get it switched out for a newer style. most stores should do this for free.

Those swings in reported battery are most definitely from misreporting drivers.
...and swapping the sim card you pulled the battery, which also helps to throw things out of whack.
I dont see any correlation to sim card and battery life in this instance...you just happened to be swapping a sim at the time.

jink25 said:
Those swings in reported battery are most definitely from misreporting drivers.
...and swapping the sim card you pulled the battery, which also helps to throw things out of whack.
I dont see any correlation to sim card and battery life in this instance...you just happened to be swapping a sim at the time.
Click to expand...
Click to collapse
FWIW, it really could be the SIM. I had a similar problem with my Nexus One - high battery drain and inability to hold a 3g signal in a solid 3g zone. T-Mobile suggested a SIM swap, which I thought would do nothing. Wrong. 3g signal locked and stayed locked and battery drain came back to normal, probably because the phone wasn't constantly seeking for 3g.
That SIM failed, BTW. Used to hold 3g well and then it stopped.

I changed my sim and i dont really see a big difference. Ill give it a few days.

DebauchedSloth said:
That SIM failed, BTW. Used to hold 3g well and then it stopped.
Click to expand...
Click to collapse
Try setting your phone to WCDMA Only so it doesn't keep seeking between 2g/4g (this really sounds like the N1 bug)

As a T-Mobile employee I can tell you that you need a new sim in all of the 4G phones G2X, MyTouch, G2, and Galaxy 4G. your experience with the new HSPA network will be directly affected with these phones and the old 2G sims, guaranteed. It only makes sense that when the new network was implimented that a new sim would be part of this puzzle. The sim is your only connection to the network, so I'm totally perplexed as to why this is even in question. The reason you are seeing such high battery drain rates is because the old sim is not connecting to the network properly. I change out customer sim cards all day long. The new sim cards are designated with a TM9073 on the back of the card if you are questioning what kind of card you have. Everyone at my store is well aware of this and whenever a 4G phone is sold a sim swap is performed to make sure of a good experience. Now to complicate things there are some bad sims floating around that are 3G/4G sim cards, best way to descibe them is that the cell on the back of the card is faded looking in either a very small square or very large one. If you have a "good" 3G/4G sim the size of the cell will be in between these two sizes and it will be well defined and not look faded. if you have been with T-Mobile longer then 2-3 months you may need a sim swap which is free as long as you are not replacing a lost or stolen sim in which case the cost is $19.99. If you have been a customer for two years or more you Definately need a new sim with a 3G/4G phone. T-Mobile has released very little info about this and even a lot of the new phones still are prepackaged with the not so good sims. If the people working at your local Authorized T-Mobile Retailer don't know this I'm not surprised. Do yourself a favor, before you fly the handle about bad battery life or poor reception with this phone check your sim and if need be swap it for a new one, it's free. Hopefully this helps

My G2X came prepackaged with the 4G TM9073 and still had battery drain issues, resets and lockups.
Has anyone received a different sim than this with their G2X?
For all the users that followed the proper protocol and used the sim that came with the phone I dont see this as being the issue for battery drain problems. It has been documented that there are several software issues related to battery drivers, and possibly even a hardware issue with charging via wall adapter.
While on the topic of sims though...DO NOT touch the contacts on the sim, leaving oils and fingerprints on it can cause issues...have seen it several times as an issue in projects I have worked on manufacturing embedded devices.

[Q] Broken Antenna ?

So I've dropped my Nexus 5 twice on concrete by accident. The first time it cracked the camera glass and the second time, half of the back cover clips popped off but I just pushed them back in. So in my attempt to DIY fix the cracked camera glass and replace it, I tried popping off the back cover (with proper plastic tools). But I couldn't get the clip under the SIM tray and the volume rockers so I gave up. But now, recently I can't get any signal when I'm inside a building and the signal when I'm outside fluctuates from full bar + LTE to no service to emergency calls only. I thought it might have been my SIM card so I went to T-Mobile to get another SIM which worked fine for like 10 minutes until the same problem came up again. So now I'm thinking could I have damaged the SIM reader in the phone or an antenna?

crazykidguy said:
So I've dropped my Nexus 5 twice on concrete by accident. The first time it cracked the camera glass and the second time, half of the back cover clips popped off but I just pushed them back in. So in my attempt to DIY fix the cracked camera glass and replace it, I tried popping off the back cover (with proper plastic tools). But I couldn't get the clip under the SIM tray and the volume rockers so I gave up. But now, recently I can't get any signal when I'm inside a building and the signal when I'm outside fluctuates from full bar + LTE to no service to emergency calls only. I thought it might have been my SIM card so I went to T-Mobile to get another SIM which worked fine for like 10 minutes until the same problem came up again. So now I'm thinking could I have damaged the SIM reader in the phone or an antenna?
Click to expand...
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More than likely the back cover is no longer making good contact with the body of the phone. Try applying slight pressure at the back on the top third of the phone and see if that helps.

Did you solve this issue? It sounds similar to a problem I'm currently experiencing.
Thanks,
Will

Nexus 5 loss of ntework signal
wch93 said:
Did you solve this issue? It sounds similar to a problem I'm currently experiencing.
Thanks,
Will
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I have lost my network signal after I removed the back to improve the GPS function. It is not existing or very weak.
Has anyone a clue how to fix this?
Arno

ZeilerNed27 said:
I have lost my network signal after I removed the back to improve the GPS function. It is not existing or very weak.
Has anyone a clue how to fix this?
Arno
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Click to collapse
I have the same problem. A fix to this would be very helpful. My phone is now almost permanently stuck at H instead of LTE. When I do see LTE, it's one or two bars where it used to be full bars.

I'm not alone... Anyone can help us?

I found out what my problem was. While opening up the case, I must have slid my tool too far in. It actually got in the same spot as the antenna connection on the top right side, right above the battery. When I applied pressure to open the case, it unhooked the antenna. Re-opening the case and using some tweezers, I was able to re-position the wire and snap it back on like a button. Restored all of my connection.

I've tried, but don't work

Comrade1809 said:
I found out what my problem was. While opening up the case, I must have slid my tool too far in. It actually got in the same spot as the antenna connection on the top right side, right above the battery. When I applied pressure to open the case, it unhooked the antenna. Re-opening the case and using some tweezers, I was able to re-position the wire and snap it back on like a button. Restored all of my connection.
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did u remove the speaker module to fix this issue?

ajaxcbcb said:
did u remove the speaker module to fix this issue?
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I didn't have to remove the speaker module. I just had to reconnect the cable on the right back into it's slot. That's what got disconnected when I opened up the back.

Antenna
Comrade1809 said:
I didn't have to remove the speaker module. I just had to reconnect the cable on the right back into it's slot. That's what got disconnected when I opened up the back.
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is there a cable?? from what i know the silver thing is the antenna
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What? No.... My situation had nothing to do at all with the speaker or any other portion of the phone aside from the antenna wire.
If you open up the back of the phone, on the right side of the battery, there is a small wire that runs along there and connects just to the right top side of where the battery ends. It is covered by a small black plastic piece that is supposed to stop it from coming off. I accidentally disconnected that wire with the tool I used to open the back of the phone. After reconnecting it to it's proper place, my signal came back without further issues.
I attached a picture with a red arrow pointing to where the antenna is connected. If it's loose, I would suggest reconnecting it and checking your signal again.

Comrade1809 said:
I didn't have to remove the speaker module. I just had to reconnect the cable on the right back into it's slot. That's what got disconnected when I opened up the back.
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oh thanks mate. finally resolved the problem. seems the cable is actually kinda loose. after getting it hook up. signal is back and blazing. thanks

Broken black antenna cable
Comrade1809 said:
What? No.... My situation had nothing to do at all with the speaker or any other portion of the phone aside from the antenna wire.
If you open up the back of the phone, on the right side of the battery, there is a small wire that runs along there and connects just to the right top side of where the battery ends. It is covered by a small black plastic piece that is supposed to stop it from coming off. I accidentally disconnected that wire with the tool I used to open the back of the phone. After reconnecting it to it's proper place, my signal came back without further issues.
I attached a picture with a red arrow pointing to where the antenna is connected. If it's loose, I would suggest reconnecting it and checking your signal again.
Click to expand...
Click to collapse
my antenna clip broke off the main logic board. is there any way of fixing this. I get no service now

luv2vexx said:
my antenna clip broke off the main logic board. is there any way of fixing this. I get no service now
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Click to collapse
If you're really good at soldering you could give it a try. Otherwise I'd try and play the warranty card. I don't think there's a replacement part just for that, like there is one for the speaker or the camera. I may be wrong though.

similar problem
I bought a used Nexus 5 which suffered water damage as I later found out. The seller told me, that he used the phone until I bought it. Now when I want to use the phone with my sim, which is a new one, I have a very weak signal. I lose it most of the time. When I use the phone with a sim from another carrier (the same like the seller used) it's working fine. The phone also works with a third carrier but not with the one I want to use. There is also another phenomenon: when I take of the back cover, the signal becomes much stronger, still not good but much better. The sim is ok, because I use it now with my old phone and have no problems with the connection. Has anyone an idea where the problem could be?
I’m thankful for any help.

Excellent signal after reconnecting antenna
Thanks for the tip! I dropped my phone some weeks ago and since than I got bad reception, usually only EDGE and only outdoors but not really reliable. I had the chance to test my sim card in my friend's phone and with that I got excellent connection (40Mbps). I tryed factory reset but it did not help.
Solution:
After removing the plastic cover above the battery with a phillips #00 screwdriver I found that the antennas were not properly connected (the black and the white cables). I snapped them back to place, and after that my phone was able to connect to LTE.

I am super interested in this topic. I actually have a nexus 5(which has since been replaced by another nexus 5) that got some water damage on it from being in my clothes when they were hosed down. everything on the phone works, wifi, gps, speakers etc except cell signal. I get it sometimes for barely a second and then it is gone again. My thinking here is that my antenna is shot.
Anyone ever find out if this is a part that can be replaced? Would love to have two working nexus 5's just in case I need one as a back up or something.

Oh well! a bit over a year ago I stopped getting LTE and H from my carrier, tried everything and nothing worked, I guessed it was a factory defect and surrendered because I imported the device and couldn't send it thru warranty. I tried another carrier SIM and it did get at least H (no LTE however) so I switched to that carrier cause i wasnt gonna live with EDGE only, and I've been living like that for 14 months until now that I stumbled upon this thread, opened my N5, found out that same right cable antenna was not well connected, put it back where it belongs, now im getting full LTE, and I wanna kill myself! If I had noticed this before I wouldn't have had to go thru the mess of switching carriers and having to pay a more expensive plan! LMAO either way THANKS! Finally back on LTE !!!

Could you please tell how this antenna looks like? A photo of that would help me to fix my issue,. I have dropped my phone and I get as no service with signal strength as 0. Did u face this before u fixed ur antenna?

[Q] Moto G lose network service

Hello
I bought my Moto G in the past moth, and until today it happens to me 3 times, the phone gives me a Message "Emergence only" or something similar, and then a lose my connection to 3g and GSM.
I try to put in airplane mode and then put airplane mode off, but never ask for my pin and continuous without conection. The only way it is to shout down a take the sim and reenter again, after this it work.
I have the European version in the last KitKat version, no root and no moods.
Anyone knows how to fixed?

Hello,
I'm also getting the same issue with my moto g. It randomly loses the network, asking again for the SIM pin.
I have the 4.4.2 [Unofficial] AOSPA+ 4.2 [BETA2] Paranoid Android.
Any clues on this issue?
Thanks
PMJ said:
Hello
I bought my Moto G in the past moth, and until today it happens to me 3 times, the phone gives me a Message "Emergence only" or something similar, and then a lose my connection to 3g and GSM.
I try to put in airplane mode and then put airplane mode off, but never ask for my pin and continuous without conection. The only way it is to shout down a take the sim and reenter again, after this it work.
I have the European version in the last KitKat version, no root and no moods.
Anyone knows how to fixed?
Click to expand...
Click to collapse

It is different, my don't ask for the pin, my don't even recognize the Sim card.
I talk to the assistance of moto g, and they said to change to another Sim card. But I don't believe that it will solve
Sent from my XT1032 using Tapatalk

It can happen for places with low signal; i had same issue while being in my bedroom (walls are 1 meter thick made from stone) switching to 2g solved the issue and gave me max signal bars all the time.
Btw i did not have pin problem because i removed it

This happen in my home and in my university. They are near to each other and I have always 5 bars with the 3g one. I don't think it is that.
To solve temporarily the problem I just take off the Sim and put again, without turn off the phone and it immediately recognize the Sim and ask for the pin and works
Sent from my XT1032 using Tapatalk

I had this issue, and it caused no end of trouble. I'm currently without my Moto G, as according to the Phones4U Repairs Tracker, it's "Within repair process" and I left it with P4U 11 days ago.
I might have a different cause to you guys, because it looks like there is/was a software issue that causes this behaviour too. And this is going to sound stupid, and if I hadn't seen it myself, I wouldn't have believed it. But my issue is the spring-loaded SIM card slot has too much spring. It slowly pushes the bloomin' SIM card out slightly after a random length of time.
Initially I thought it was something I'd done, despite getting a SIM free one and only doing official updates. So I factory restored the phone, and that didn't help. So then I couldn't believe it was the phone, I figured it was the SIM card. So I swapped SIMs. Same issue. Then it happened to do it before I put the rear cover back on, and I could see the slight difference.
It happens after a random length of time, but because it doesn't come all the way out, it makes an intermittent connection. I could have fixed it with a bit of tape, but it was under warranty. I'm currently using a mate's LG Optimus 4X HD P880 while I await the return of my Moto. Bad times.
Thankfully I managed to demonstrate this to the lady at the desk in P4U who added it to the repair documentation, I got lucky because sometimes it didn't do it for ages after I'd reinserted the SIM. Otherwise Moto could have looked at it, not seen the problem actually occur in front of them (as it happens after a random length of time) and just sent it back with NFF. I've still got my fingers crossed that they fix it and this resolves the issue though.

I believe you, It can be a problem with the spring. My Sim card it was cut to fit on the micro slot, I will ask for one micro Sim on my carrier and see if it solve the problem.
Sent from my XT1032 using Tapatalk

Mine both came precut, it made no difference. My carrier is a UK MVNO called Giffgaff.

My it is Vodafone from Portugal. I will try anyway. But I hope that it solves by itself
Sent from my XT1032 using Tapatalk

Mine Sim 2 works fine but Sim 1 frequently loses signal.
I guess the problem occurs only when data is active.

I forget to say.
I solved the problem with a new Sim card. The other that I have was a old version, the inside cheap was bigger then this one, I have.
Sent from my XT1032 using Tapatalk

I had this issue when it said 'emergency calls only' and just for giggles I tried it and it would not even place a call to 911

But it is solved now for you?
Sent from my XT1032 using Tapatalk

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[Q] Cell reception and WiFi issues

I hope by posting this here we can find an answer to a problem that a lot of OPO users are complaining of. the device has a terrible cell and WiFI reception when compared to other devices in the same area and using the same wifi networks.
Cell reception:
I`m on a 4G network . however i find that i have 0-1 bar almost all of the time in areas where i used to have 3-4 bars. and as a result i constantly get missed calls notifications. I read that switching to 3G in the phone settings might help, and that`s when i ran into the second problem. Switching to 3G will indeed give me better reception 3-4 bars but then the whole connection becomes erratic, and the phone will go from 3 bars to ``no connection`` back to 4 bars 4 to 5 times every minutes and i will lose mobile data totally on 3G.
WiFi reception and connection:
I have a secure 802.1x connection at work spread over 2 buildings. the phone will connect to 1 only and will not connect to the same network in the other building at all. both have the same SSID , settings, and login information. but the phone will just cycle between `connecting`` to `` secured with 802.1x``. I tried all roms available and the only ROM that worked was `Gummy ROM``. only when using that ROM, is the phone able to connect to that WiFi network!! and i have no explanation for that.
All these problems I mentioned above are consistent across all roms and there seems to be no answer from OPO support or on the official forum for the phone. I hope someone can provide me with a solution or an answer to this.
Thank you all

asem said:
I hope by posting this here we can find an answer to a problem that a lot of OPO users are complaining of. the device has a terrible cell and WiFI reception when compared to other devices in the same area and using the same wifi networks.
Cell reception:
I`m on a 4G network . however i find that i have 0-1 bar almost all of the time in areas where i used to have 3-4 bars. and as a result i constantly get missed calls notifications. I read that switching to 3G in the phone settings might help, and that`s when i ran into the second problem. Switching to 3G will indeed give me better reception 3-4 bars but then the whole connection becomes erratic, and the phone will go from 3 bars to ``no connection`` back to 4 bars 4 to 5 times every minutes and i will lose mobile data totally on 3G.
WiFi reception and connection:
I have a secure 802.1x connection at work spread over 2 buildings. the phone will connect to 1 only and will not connect to the same network in the other building at all. both have the same SSID , settings, and login information. but the phone will just cycle between `connecting`` to `` secured with 802.1x``. I tried all roms available and the only ROM that worked was `Gummy ROM``. only when using that ROM, is the phone able to connect to that WiFi network!! and i have no explanation for that.
All these problems I mentioned above are consistent across all roms and there seems to be no answer from OPO support or on the official forum for the phone. I hope someone can provide me with a solution or an answer to this.
Thank you all
Click to expand...
Click to collapse
I'm getting the same problems.
Where signal is always strong, it seems to work OK, but with weaker signal it just screws up!
Its really pissing me off as i've take the phone to work for the first time, just to find out I cannot get any signal there, where by my HTC Desire worked just fine.

Also getting exactly the same problems. It is impossible to use OPO where signal is not so strong although other phones work flawlessly. Reception signal strength goes up and down all the time from full to none bars. Data connection is inconsistent.
Anyone with weak inconsistent signal strength vote here: https://jira.cyanogenmod.org/browse/BACON-132

I still hope that what we are experiencing is due to firmware and drivers issues that can be solved by the developers on XDA. However, the complete silence by OnePlus and Cyanogen regarding this issue despite the number of people complaining, makes me worried that it's a bigger hardware issue that they are trying to avoid and move into "we'll fix it in the next version of the phone” kind of scenario.
Sent from my A0001 using Tapatalk

asem said:
I still hope that what we are experiencing is due to firmware and drivers issues that can be solved by the developers on XDA. However, the complete silence by OnePlus and Cyanogen regarding this issue despite and number of people complaining makes me worried that it's a bigger hardware issue that they are trying to avoid and move into "we'll fix it in the next version of the phone” kind of scenario.
Sent from my A0001 using Tapatalk
Click to expand...
Click to collapse
That would be bad scenario. I hope that it is just software problems. But seeing how OnePlus deals with the problems I also have doubts.

I would say it's software baseband/modem and CM needs to step it up. My Nexus 5 has a better signal strength. But then Google has a much bigger development team than CM or One plus. My friend has the GS5 and it has the snapdragon 801 chip set and it has a much better signal strength.
So ether the One's antenna is not that great or it a software problem.
As you can see the controller is on chip.
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I don't have it as bad as some have posted so hope things get fixed for all.

Yeah. Many users are having problems with cell reception.
It's a shame.

My wife & I both using OPO international version, both of us facing poor signal & sound problem when we get them. Sound problem is currently handled by boosting the sound but frankly the sound is a bit deteriorated. The signal problem is better a bit now by installing oppo 7 radio. Hope the team can put more effort on the signal problem. It is phone!

I have this issue too, but I think this is a hardware problem, because CM and OPO teams do nothing for fix this problem, and Chao Chen at CM Jira says that this poor signal is a normal... I realy think about selling my OPO and buy another phone...

I have pretty crappy signal on mine too (London UK). Signal strength fluctuates wildly even by moving the phone in a different direction. I've reverted to the previous modem via a flash .zip and things seem a bit better but it's early days. I would have thought that number 1 priority for a phone is that it actually works well as...well, a phone!
Disappointed that the 'giant killer' tag doesn't quite match the reality.
I sincerely hope there are improvements but I have my doubts.

virgopunk said:
I have pretty crappy signal on mine too (London UK). Signal strength fluctuates wildly even by moving the phone in a different direction. I've reverted to the previous modem via a flash .zip and things seem a bit better but it's early days. I would have thought that number 1 priority for a phone is that it actually works well as...well, a phone!
Disappointed that the 'giant killer' tag doesn't quite match the reality.
I sincerely hope there are improvements but I have my doubts.
Click to expand...
Click to collapse
I don't have this problem on O2 uk wonder if its anything to do with 4g which isn't supported on this network. Have any of you tried PAC rom.

This problem is really starting to be a major issue for me. I expected some improvement by now.
Does anyone know is this has been confirmed as a radio/kernel issue or a hardware issue (antennas maybe).

[Q] Major connectivity issues!

Is anyone else having this problem?
I've got a dual SIM SGS6 from Expansys AU (based in HK). I've got a new nano SIM card in SIM1 slot, SIM2 is empty. I've transferred my service across to the new SIM and confirmed (using an adaptor) that I can get 4G service fine on my Nexus 5.
However on my SGS6 it only shows 3G, H or H+, never 4G. I also find that every few minutes the data connection goes completely. I happened to be in the dual SIM menu at the time and noticed it went from showing only SIM1 being present to both SIM1 and SIM2 being lit up - as you can see this corresponds with the phone showing 'no signal' in the notification tray. It also keeps on sometimes showing the message "When changing SIM Card, Data service slot also can be changed. When you want to change Network mode, please go Mobile network menu and change it." (poor grammar all Samsung's!)
Has anyone seen this before or is it going to be a case of having to ship it back to them?

alanjrobertson said:
Is anyone else having this problem?
I've got a dual SIM SGS6 from Expansys AU (based in HK). I've got a new nano SIM card in SIM1 slot, SIM2 is empty. I've transferred my service across to the new SIM and confirmed (using an adaptor) that I can get 4G service fine on my Nexus 5.
However on my SGS6 it only shows 3G, H or H+, never 4G. I also find that every few minutes the data connection goes completely. I happened to be in the dual SIM menu at the time and noticed it went from showing only SIM1 being present to both SIM1 and SIM2 being lit up - as you can see this corresponds with the phone showing 'no signal' in the notification tray. It also keeps on sometimes showing the message "When changing SIM Card, Data service slot also can be changed. When you want to change Network mode, please go Mobile network menu and change it." (poor grammar all Samsung's!)
Has anyone seen this before or is it going to be a case of having to ship it back to them?
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Aren't the dial sim versions intended for the Chinese markets? If that's the case, you may not have the correct LTE radio bands for where you live.

Doesn't seem to be that - the bands fit according to the specs and at some points it does connect properly to 4G/4G+ - it just doesn't hold it

Maybe damaged SIM??

Don't think so - it's a brand new Nano SIM direct from the network and works stably in 4G on my Nexus 5 (with a nano to micro adaptor).
Managed to get 4G/4G+ working for a while yesterday and today, but has now stopped working again.
Get a message everytime the phone boots re. network manager (as posted in OP), which doesn't seem right to me. Also finding it still drops all network connections from time to time and even switched off totally at one point today. I've gone back to the retailer requesting a return either for full refund or exchange for replacement.

What was the outcome?
alanjrobertson said:
Don't think so - it's a brand new Nano SIM direct from the network and works stably in 4G on my Nexus 5 (with a nano to micro adaptor).
Managed to get 4G/4G+ working for a while yesterday and today, but has now stopped working again.
Get a message everytime the phone boots re. network manager (as posted in OP), which doesn't seem right to me. Also finding it still drops all network connections from time to time and even switched off totally at one point today. I've gone back to the retailer requesting a return either for full refund or exchange for replacement.
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Thanks for your posts Alan I am having similar issues with 1 day old Galaxy S6 dual sim in Australia with Telstra.
- Phone loses connection to carrier (both) from time to time - especially if in the sim manager screen but also just randomly
- It looks like it is seeking a network - like polling through different bands
- if i watch it for a while i can often catch it doing this
- on 4 occasions in a day this has then reboot the phone
- it has not yet dropped out during a call - not sure if this is just luck
- I am asking for it to be declared DOA but not sure how that will go yet
I was wondering if you returned or swapped your phone or found a fix.
Thanks
Dodgyd-AU

Sadly that sounds pretty similar to my experience I ended up returning it (although am having ongoing issues with the retailer, Expansys, in getting a full refund!) and subsequently bought a single SIM model direct from Samsung.