LG Optimus Black signal problem - LG Optimus Black

I have a LG Optimus Black with 4.0.4 and i cannot receive any signal. Phone is not rooted. I did a factory reset on it but it didn`t help. Some times i have a signal for about 2 - 3 mins. Help?

cristiann1 said:
I have a LG Optimus Black with 4.0.4 and i cannot receive any signal. Phone is not rooted. I did a factory reset on it but it didn`t help. Some times i have a signal for about 2 - 3 mins. Help?
Click to expand...
Click to collapse
Signal? You mean data (3G)?
Have you checked your APN settings under Mobile Netwrks? (I think there was a "More" option). These need to match your carrier's required settings.

androcraze said:
Signal? You mean data (3G)?
Have you checked your APN settings under Mobile Netwrks? (I think there was a "More" option). These need to match your carrier's required settings.
Click to expand...
Click to collapse
It seems ok to me.. but under the Available networks i cannot select a network, it says Your sim card does not allow a connection to this network (i am trying to connect to my network)

cristiann1 said:
It seems ok to me.. but under the Available networks i cannot select a network, it says Your sim card does not allow a connection to this network (i am trying to connect to my network)
Click to expand...
Click to collapse
Look up the defaults from your carrier and verify everything. I ran into an issue where my carrier changed things around; older SIM cards used different settings than newer cards. If you went online, only the newer settings were listed. I had to do some searching to verify the old SIM card settings.
What network?

androcraze said:
Look up the defaults from your carrier and verify everything. I ran into an issue where my carrier changed things around; older SIM cards used different settings than newer cards. If you went online, only the newer settings were listed. I had to do some searching to verify the old SIM card settings.
What network?
Click to expand...
Click to collapse
i`m on orange (romania). i tried using a vodafone sim as well but it didn`t work.

Ok, the best / weirdest thing happened. I removed the back cover of the phone, now i have full signal. What can it be?! I`ve looked every square inch of the cover and nothing seems to be "wrong" ..

cristiann1 said:
Ok, the best / weirdest thing happened. I removed the back cover of the phone, now i have full signal. What can it be?! I`ve looked every square inch of the cover and nothing seems to be "wrong" ..
Click to expand...
Click to collapse
Dunno. If you put the cover back on and it works... Maybe a fluke.
If it doesn't work with the cover on, then it's either a weak antenna, or the cover is putting pressure on something, causing a short.

Related

Lost Data Connection!

3G and H are appearing but nothings happening, no activity. This is after a data\cache wipe. Any fix or do I need to flash again?
On JPO
Check your apn settings. Also, try searching for your network provider.
terranq said:
Check your apn settings. Also, try searching for your network provider.
Click to expand...
Click to collapse
It's set to orange internet, network provider is set to orange.
dial *#*2263* and make sure all the bands are selected (go under combi bands and select them all). Other than that, not sure.
That's not doing anything on my phone, you sure that works with froyo?
Nevermind, tried sgs tool, all are selected... Still not working..
Ps: swype is awesome.
Shocky2 said:
It's set to orange internet, network provider is set to orange.
Click to expand...
Click to collapse
Get the exact APN name from Orange and make sure it's set for internet.
Sometimes, telcos have multiple APN settings.
Sent from my GT-I9000 using XDA App
What he said. Sorry I got the code wrong, I was going from memory. Failing that (apn check), you may have to reflash, but I'd see if you can get some insight from someone a little more experienced than me
maybe he updated to froyo and lost his imei
Don't understand why but it appears to be working now, I also tried it this morning with no luck maybe it's due to location, but it was working fine before...
Very strange, will try later today and see if it's still working.
Shortly after getting home, got no service message, after reconnecting to network the 3G connection is dead again.
I'll reflash later, this isnt right..
Exactly the same after being flashed and reseting everything to defaults, this is great.
Last time I touch clockwork recovery.
Can't even make any calls now , either the sim cards messed up or the phone is...
I'm starting to hate this phone.

Note I9220 no signal in UK problem

Hi All
I bought my galaxy note i9220 in China on 18th Aug. It is a genuine phone, NOT a clone just to note.
It was working perfectly fine when I was in China using a China Mobile SIM card.
Last Sunday I went to hongkong to catch a flight to London, and when I was in Hong kong, I changed back to my UK 3 SIM card, which again, was working OK in hongkong.
Before flight took off, I switched the phone off.
During the flight, I must have hit some button and accidently switched the phone on ( as when I landed, I took my phone out and it was “ON” with no signal).
Ever since I landed in Heathrow, I got no signals. The phone shows I can only make emergency calls.
I have tried all of the below but none worked:
1) Switching the phone off & on.
2) Take out battery (while phone was off) & SIM and put them back later.
3) Take out battery (while phone was on) & SIM and put them back later.
4) Reset to manufactory status.
When I go to Setting – Wireless & Network – Mobile Network – Search operator, I can see “3” in the list of operator, but when tried to connect to it, it said “Unable to connect to the network”.
The “3” sim worked fine in my old NOKIA phone so I don’t think it’s a problem on the SIM.
Anyone able to help? Thanks sooo much!
a suggestion..try to make sure you inserted the sim card with the bend angle facing the bottom of your phone..sometimes you insert your sim in a wrong way and this cause your problem..am not trying to be funny but it happen with quite a lot of people including me...
or Could be a fault on your phone..and these things happen..
or your sim is invalid for a reason..i suggest to get a pay as you go 3 uk sim card and try it ...or call 3 customer service and speak to one of their agents to have a look at your account ... they might send you another sim or pop in one of their stores and speak to someone about it...if nothing wrong with your account then am afraid it is a hardware issue with your phone..
Are you sure the phone is not a 4G phone?
This won't work in the UK as our Cell's are different as well.
Also: http://www.chinaphonereview.com/hdc-galaxy-note-plus-gt-n7000-i9220
scorpion100 said:
a suggestion..try to make sure you inserted the sim card with the bend angle facing the bottom of your phone..sometimes you insert your sim in a wrong way and this cause your problem..am not trying to be funny but it happen with quite a lot of people including me...
or Could be a fault on your phone..and these things happen..
or your sim is invalid for a reason..i suggest to get a pay as you go 3 uk sim card and try it ...or call 3 customer service and speak to one of their agents to have a look at your account ... they might send you another sim or pop in one of their stores and speak to someone about it...if nothing wrong with your account then am afraid it is a hardware issue with your phone..
Click to expand...
Click to collapse
The sim works fine on my old Nokia phone, and i tiredputing the SIM different ways but still no luck....anooying thins is the phone was working fine but started to give me prob. as soon as i landed UK...
santoz said:
Are you sure the phone is not a 4G phone?
This won't work in the UK as our Cell's are different as well.
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Click to expand...
Click to collapse
Got my mum called the phone provider back in CHina they said it should be ok to use in the UK.
They asked me to check my SIM freuency (or sth like this). and said as long as it is on GSM900/1800/1900MHZ, then it should work...what is that???
Try change your network settings between the options, gsm, hspa, and wcdma. Think it's settings, more, mobile networks, network mode.
Probably one of those should sort you out.
hkgrob said:
Try change your network settings between the options, gsm, hspa, and wcdma. Think it's settings, more, mobile networks, network mode.
Probably one of those should sort you out.
Click to expand...
Click to collapse
Thanks.
When i went into the"mobile networks", the phone started auto search of network.
And it returns network lists:
3
O2 (forbidden)
Vodafone (forbidden)
I understand the 2 being forbidden as im not a custmer of either O2 or VDF, but it just does not allow me even to connect to 3..grrr very anooying.....
I will try changing the settings when i get home today.
hkgrob said:
Try change your network settings between the options, gsm, hspa, and wcdma. Think it's settings, more, mobile networks, network mode.
Probably one of those should sort you out.
Click to expand...
Click to collapse
THere is no network mode in the mobile network ....how can i change the mobile network type in the SGN?

No T-Mobile network

I took my girlfriends S1 on holiday with my 3 network sim in it, when we came home I put her T-mobile sim back in, now it will not connect to the T-Mob network, it will connect to 3G? Putting the sim in my SNote and all is well. I have since install a custom rom to see if that would help but still no good.
Galaxt S1 running CyanogenMod 10 nightlies.
boringfrog said:
I took my girlfriends S1 on holiday with my 3 network sim in it, when we came home I put her T-mobile sim back in, now it will not connect to the T-Mob network, it will connect to 3G? Putting the sim in my SNote and all is well. I have since install a custom rom to see if that would help but still no good.
Galaxt S1 running CyanogenMod 10 nightlies.
Click to expand...
Click to collapse
try inserting the SIM card in the correct direction or a solution from My Android Solutions
Problem
xsenman said:
try inserting the SIM card in the correct direction or a solution from My Android Solutions
Click to expand...
Click to collapse
Believe me I have taken the sim out and tried it in the "wrong way" lots of times. I have also looked at your solutions page before, very helpfull. But why will the sim work on one network but not on another, and the non working sim will work in another phone????
boringfrog said:
Believe me I have taken the sim out and tried it in the "wrong way" lots of times. I have also looked at your solutions page before, very helpfull. But why will the sim work on one network but not on another, and the non working sim will work in another phone????
Click to expand...
Click to collapse
Check the modem on both phones.
If the phone that doesn't recognize T-mobile has a different modem, then load the modem that the phone that works has through oden or CWR.
Hope you know how to check the modem and load new ones.
Good luck
boringfrog said:
But why will the sim work on one network but not on another, and the non working sim will work in another phone????
Click to expand...
Click to collapse
This will happen as T.Mobile may be using a different Radio band ..most likely you changed the APN and Network settings when you used it with another SIM Card , whilst abroad ...all you may had to do was check your Network Settings in menu> settings>wireless and Networks> Mobile Networks and reset it back for the T.Mobile network, initially
To understand this better read this http://en.wikipedia.org/wiki/UMTS_frequency_bands
at the same time since you upgraded by flashing to JB, you may have to select a new modem that is suitable for JB, you will find all modems at My Android Collections
Data but no calls
Me back again, I have tried all xx modems, reverted back to stock rom, then GB, them back to CM10. When I first turn on phone it finds network (i'm on a giffgaff sim now) it says GiffGaff at the bottom of the screen for about 2 seconds, then it says emergengy calls only. I can still connect to internet. APN settings correct, IMEI correct, In Settings - About Phone - Status, i'm connected to network, service status = out of service, mobile network state = connected, my phone number = unkown. Where can I go from here?
More
Another thing I have just noticed, when I take the sim OUTwhen the phone is still ON, the "no network" on the screen turns to giffgaff,
boringfrog said:
connected, my phone number = unkown. Where can I go from here?
Click to expand...
Click to collapse
Try to set your phone number by following this guide , it was written for a Korean version, so just adjust it for your phone version.
xsenman said:
Try to set your phone number by following this guide , it was written for a Korean version, so just adjust it for your phone version.
Click to expand...
Click to collapse
Thanks for that, I have now got the number under Status, but still says out of service.

[Q] Please help! Sprint One sim unlock, Always No service and won't auto reconnect

For the last weeks.. I have been trying to get this phone working with T-Mobile..I had unlock the sim card and now running badboyz 4.3 rom. 1.3
After unlocking the sim card and setting up the apn, selected T-Mobile from the available networks and it will connect. But when I go to work, I will lose signal every few block, and need to search for available network again and wait to select t mobile again.
I had try to use the t mobile sim card on my old phone and everything will works fine with no signal lost.
Can anyone please HELP!... I been searching and looking for an answer for more than 2 weeks..but no resolve.....
Thanks
Sim Unlock
lazybozz said:
For the last weeks.. I have been trying to get this phone working with T-Mobile..I had unlock the sim card and now running badboyz 4.3 rom. 1.3
After unlocking the sim card and setting up the apn, selected T-Mobile from the available networks and it will connect. But when I go to work, I will lose signal every few block, and need to search for available network again and wait to select t mobile again.
I had try to use the t mobile sim card on my old phone and everything will works fine with no signal lost.
Can anyone please HELP!... I been searching and looking for an answer for more than 2 weeks..but no resolve.....
Thanks
Click to expand...
Click to collapse
How did you get the SIM unlocked in the first place?
lazybozz said:
For the last weeks.. I have been trying to get this phone working with T-Mobile..I had unlock the sim card and now running badboyz 4.3 rom. 1.3
After unlocking the sim card and setting up the apn, selected T-Mobile from the available networks and it will connect. But when I go to work, I will lose signal every few block, and need to search for available network again and wait to select t mobile again.
I had try to use the t mobile sim card on my old phone and everything will works fine with no signal lost.
Can anyone please HELP!... I been searching and looking for an answer for more than 2 weeks..but no resolve.....
Thanks
Click to expand...
Click to collapse
This is probably because T-mob covers only particular places the frequencies this phone uses http://theunlockr.com/2013/07/05/htc-one-sprint-specs/ vs t-mob https://t-mobile.jive-mobile.com/#jive-document?content=/api/core/v2/documents/4988
Sent from my HTCONE using Tapatalk
Is there any solution for this problem ?
Is there anything I can do to fix this problem ? (different rom or radio...etc..) Or I have to give up the phone... Cause it is too much headache to "searching for network" all the time and miss all the call with no service on the phone without knowing..
Thanks
lazybozz said:
Is there anything I can do to fix this problem ? (different rom or radio...etc..) Or I have to give up the phone... Cause it is too much headache to "searching for network" all the time and miss all the call with no service on the phone without knowing..
Thanks
Click to expand...
Click to collapse
well, I am not an expert on the tmobiles network, but going by what lazybozz, said, I seem to remember tmobile using different bands than the other carriers, so what you may be experiencing, is the phone being in the vicinity of multiple towers, but not all of them are within the band that the phone supports. So its like the phone doesnt even see those towers. On a side note, this issue caused alot of chaos for those who unlocked iphones about 3 years ago, they could use EDGE on tmobiles network but not 3G, so i assume this is a similar situation. So long story short, yeah you probably cant fix the problem, unless you get a quad band phone. I could be wrong, but it does sound like a logical reason for the issue you are having.
as elvisypi said above, Its the freq that T-mobile operates on in that area. If your getting T-mobile at all in the states then you have already flashed a radio. However flashing any other radio is not going to give you the freq that tmobile uses, Its not a software limitation its a physical hardware limitation.
Thanks for your reply, do you know any app out there that monitor and alarm you when the network or signal is lost ? That works with 4.3 ?That way at least you know the phone is offline ... some of the apps I tried is anything at all ...
Thanks
Have you tried an app like tasker? Its essentially an automation app. It isnt jist for your use. Its for many different functions. Jist look on the app store for tasker. That might help
Sent from my HTC Butterfly s using Tapatalk

Note 5 at&t emergency calls only issue.

Hello. About a 4 months ago i have bought from eBay a note 5 at&t version. I live in Greece and my network operator is WIND GR. The phone works fine but from time to time i get an emergency calls only message. And i can't get and do a phone call. If i restart the phone everything goes to normal. Sometimes it goes on and off by itself (the problem).
Have been anyone experiencing the same issue? If the phone is incompatible with my network operator should it not work at all?
Did you tried to change the sim card? Maybe issue is from sim or from sim slot
johnny.goldy said:
Did you tried to change the sim card? Maybe issue is from sim or from sim slot
Click to expand...
Click to collapse
My sim is new. When i purchased the phone i have changed my old sim with a new sim 4g compatible.
It happened again. And i am missing calls like this. I will smash it with a hammer
Go to settings, backup and reset, then reset only network settings, see if any better signal
johnny.goldy said:
Go to settings, backup and reset, then reset only network settings, see if any better signal
Click to expand...
Click to collapse
Done that right now. Tomorrow i will get a new sim card and i will post if anything gets better. Thanks for the help.
Update of the situation. I have changed sim card 2 times. It still happening. My phone runs at nougat now and the problem still appears as before at 5 and 6 Android version. I currently gonna change service provider that has better and stronger signal. From what i have discovered. When the phone looses signal due too poor service provider signal sometimes it can't register to network by itself. If i enable airplane mode and then turn it off it comes back. Any clue? If it's hardware issue what can i change?
Should i have at the mobile networks auto detect or manual and my carrier?

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