[Q] no 3g in gsm tab - Galaxy Tab 3 Q&A, Help & Troubleshooting

I just bought the tab 3 7" T217A from at&t and went to Mexico to use it in 3g but I don't get any data access.
The tab recognize the sim card company (telcel) and the APN values are correct, it's Sim unlocked I suppose.

Pretty much all carriers in the US are locked to their devices. However, that should not stop you from data connections unless the host carrier does not have data or the host carrier uses different frequencies for data. It is also possible you may have to use EDGE and not 3G for your data. My iPhone 3GS worked in Afghanistan on GSM but I was limited to EDGE as they had no 3G. Just a thought. You should go to a local cell phone store and ask about data on the T217a.
Caveat: I do not know the Mexican network nor the device you are using. My comments are just based off of assumptions.

Yes, you are right, I had few phones that appears in edge but can connect tod data but in this case the signal icon appears just the bars but no E icon or roaming.
I think I'll go to a store to check it

Related

Q: Why does my data constantly switch?

I'm on att and my nexus constantly goes from h to e to 3g and all around. It pisses me off. I called att and had a case opened because my phone was on a 3g plan and they can't change it to a 4g hspa + plan because my device is unknown. Is anyone else on att and had this? What did you do?
The phone should always switch back to UMTS (3G) when the data connection is "idle", and only switch to HSPA+ (H) when data is actively transferring. This is a power-saving feature of GSM because UMTS has a much lower power draw than HSPA+. Your phone should not be switching down to EDGE unless you're in a bad coverage area (0-1 bars of 3G, for example).
As far as AT&T not provisioning the plan for HSPA+ "4G", how did you start the account? If it was started with any other non-LTE smartphone, you should be provisioned for HSPA+ already. AT&T does do some weird provisioning and uses APNs often to restrict speeds, but unless you were previously on an LTE plan you should be provisioned just fine for the full speeds.
If you're constantly switching between EDGE and 3G but you're in a good signal area, you may have problems with your SIM. It may be easiest to go into a store to get the SIM replaced, and talk to someone to make sure its provisioned properly for HSPA+. I really hate that AT&T messes with this stuff, it makes it hard to move around the SIM into different devices, a huge feature of being on a GSM carrier.
Try the scotch tape trick, put 1 layer of tape on the non contact side of sim card. There have been issues with sims being too thin by less than .5mm and not making good connection.
If that doesn't work, get a new sim from any att store, it's free.
Sent from my HTC One X using xda app-developers app
martonikaj said:
The phone should always switch back to UMTS (3G) when the data connection is "idle", and only switch to HSPA+ (H) when data is actively transferring. This is a power-saving feature of GSM because UMTS has a much lower power draw than HSPA+. Your phone should not be switching down to EDGE unless you're in a bad coverage area (0-1 bars of 3G, for example).
As far as AT&T not provisioning the plan for HSPA+ "4G", how did you start the account? If it was started with any other non-LTE smartphone, you should be provisioned for HSPA+ already. AT&T does do some weird provisioning and uses APNs often to restrict speeds, but unless you were previously on an LTE plan you should be provisioned just fine for the full speeds.
If you're constantly switching between EDGE and 3G but you're in a good signal area, you may have problems with your SIM. It may be easiest to go into a store to get the SIM replaced, and talk to someone to make sure its provisioned properly for HSPA+. I really hate that AT&T messes with this stuff, it makes it hard to move around the SIM into different devices, a huge feature of being on a GSM carrier.
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Thanks so much for the help I'll head into a store and see what the issue really may be.
c5satellite2 said:
Try the scotch tape trick, put 1 layer of tape on the non contact side of sim card. There have been issues with sims being too thin by less than .5mm and not making good connection.
If that doesn't work, get a new sim from any att store, it's free.
Sent from my HTC One X using xda app-developers app
Click to expand...
Click to collapse
Funny you said that its the first thing I tried

Xperia Play Connecting to Edge, Not 3G

I bought an unlocked Sony Ericsson Xperia Play R800i from Amazon to use with a Straight Talk sims card; however, I'm unable to connect to 3G. The phone only shows an Edge connection. Straight Talk specifies that the phone must operate in 850 and 1900 MHz bands. Here's what the Amazon page says about my phone:
This phone can be paired with 800/850/1800/1900 MHz UMTS/HSPA 3G networks in the United States (as well as 900/2100 MHz 3G networks found around the world, including in Europe and Asia). In areas not served by a 3G network, you'll continue to receive 2G data service via the EDGE network (depending on network compatibility).​
I might be wrong, but doesn't that mean it operates under Straight Talks specifications?
hi friend...i've been following you.
Where are you located
sent from my Sony Ericsson Xperia Play™(r800x) Running Slimbean 3.0 using Tapatalk 2™
Amazon lied to you, I'm waiting for my R800i refund. Read this post: http://forum.xda-developers.com/showthread.php?p=35756984#post35756984
i have the same issue but with my carrier offering 3G at 2100 Mhz which is Xperia Play supporting. When searching for carrier it shows me just 2G provider, non 3G. when WCDMA only selected, i lose signal. I am in coverage of 3G and my plan is supporting it.
Could it be hardware issue? i did factory reset but still having this issue. Connections just through EDGE, GPRS or Wifi
triscene said:
i have the same issue but with my carrier offering 3G at 2100 Mhz which is Xperia Play supporting. When searching for carrier it shows me just 2G provider, non 3G. when WCDMA only selected, i lose signal. I am in coverage of 3G and my plan is supporting it.
Could it be hardware issue? i did factory reset but still having this issue. Connections just through EDGE, GPRS or Wifi
Click to expand...
Click to collapse
Do you live nearby a 3g tower?
eksasol said:
Amazon lied to you, I'm waiting for my R800i refund. Read this post: http://forum.xda-developers.com/showthread.php?p=35756984#post35756984
Click to expand...
Click to collapse
I purchased an R800at from Amazon, which, according to that thread, should be able to connect to 3G correctly.
I've unlocked the bootloader, and flashed CM7.2 onto it, and I'm still only getting an EDGE connection. It shows a second connection under the "Network Operators" menu in the mobile settings, which, when I ran the stock ROM, was listed as "3G" but it always defaulted to the "2G" listing.
I live near a large city, and have gotten 3G on other carriers, and even 4G on a friends T-Mobile phone. I think I'm running the T-Mobile based SIM card, because the AT&T APN settings don't work with it, and the SIM came with the T-Mobile settings, it's even labeled in my APN as "Straight Talk T-Mobile" but I still only get EDGE.
I don't know much about straight talk, but is your Sim a 3G one? I had this issue a while back where i could only connect to 2G networks but then went to my carrier's store, told them the problem and they ported my contacts and number to a 3G sim and its worked ever since.
It may also be worth trying to get the APN settings from your service provider to see if this solves the problem.
I have an unlocked R800at (AT&T) that I am using on T-Mobile. Now where I live it shows that people have already reported getting HSPA+ on unlocked AT&T phones.
I have all the correct APN settings, however I always get 2G (Edge). But if i got to:
Wireless Networks
Mobile Network
And select search, for me it will bring up T-Mobile 2G and T-Mobile 3G as options. I select the 3G and it will connet and I will get HSPA+ (download of up to 7mbps, 3-5 up) for anywhere from 30 seconds to 5 minutes, then it reverts back to 2G. Its not a huge deal for me as when I was on VZ I had edge like speeds, but to be honest if I can HSPA+ then i would like to have it but I cannot find a way to get it to stay on 3G. I have used 3G speed tweaks, trying different apn's... nothing. Anyone have any ideas or suggestions?
bodmeister said:
I don't know much about straight talk, but is your Sim a 3G one? I had this issue a while back where i could only connect to 2G networks but then went to my carrier's store, told them the problem and they ported my contacts and number to a 3G sim and its worked ever since.
It may also be worth trying to get the APN settings from your service provider to see if this solves the problem.
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I'm not entirely sure. I bought it on ebay, it's listed as a T-Mobile SIM card. It was a standard size, that the seller cut to micro. I have to put it in an adapter to use it with the phone.
http://www.ebay.com/itm/271178565880?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
hi, i have the same problem. r880i, it works well on gsm, totally unstable under wcdma..the "funny"thing is that i can't make calls nor text when it gets no signal(with the yellow triangle at top left),but i have data connection(i can install apps from store,browser youtube facebook works ecc) and i get mm#6 error sometimes(the phone in not stolen or whatever lock). all working well when set to gsm; if set to wcdma/gsm, or wcdma only it does the above mentioned behavior. i've relocked bootloader and repaired with seus and am currently on stock 2.3.4.. any fix or know issues?

LTE sim card

So my work phone is a full unrestricted plan. Yes I know att doesn't theoretically have unlimited data. But my question is would that sim give me LTE connectivity in my tablet. Or is there a special tablet package that needs to be enabled on the sim that costs more?
TLDR; Can i use my att LTE sim that i use for my cell phone in my Nexus 7 tablet?
emerica243 said:
So my work phone is a full unrestricted plan. Yes I know att doesn't theoretically have unlimited data. But my question is would that sim give me LTE connectivity in my tablet. Or is there a special tablet package that needs to be enabled on the sim that costs more?
TLDR; Can i use my att LTE sim that i use for my cell phone in my Nexus 7 tablet?
Click to expand...
Click to collapse
Here is how it works in Germany (and I assume that is how it works everywhere).
You have a SIM Card which is on a GPRS Plan (normal data connection) and if you buy a special option for LTE you account will be upgraded and the SIM-Card which was running on GPRS is now able to connect to an LTE Network.
So in essence, you need an special LTE Plan, which cost more money. AND you need to be in an area where LTE is available, otherwise you pay more but the data speed is as slow as without LTE.
And DO NOT BELIEVE that you are getting 100 or more MBit/s, that is the maximum speed for that LTE Channel in the optimum distance.
If there is another LTE User with you on that channel, the speed drops. Last seen here in Munich at the Octoberfest where 30 or more people tried to connect to one particular LTE Access-Point and the system slowed down to a crawl.
On the other hand, if you have an LTE enabled phone/pad, you are getting normally a better speed performance out of an GPRS connection.
And yes I can be wrong because I am human, laugh. But based on my experience I am not.
J. :good:
OldMessage said:
Here is how it works in Germany (and I assume that is how it works everywhere).
You have a SIM Card which is on a GPRS Plan (normal data connection) and if you buy a special option for LTE you account will be upgraded and the SIM-Card which was running on GPRS is now able to connect to an LTE Network.
So in essence, you need an special LTE Plan, which cost more money. AND you need to be in an area where LTE is available, otherwise you pay more but the data speed is as slow as without LTE.
And DO NOT BELIEVE that you are getting 100 or more MBit/s, that is the maximum speed for that LTE Channel in the optimum distance.
If there is another LTE User with you on that channel, the speed drops. Last seen here in Munich at the Octoberfest where 30 or more people tried to connect to one particular LTE Access-Point and the system slowed down to a crawl.
On the other hand, if you have an LTE enabled phone/pad, you are getting normally a better speed performance out of an GPRS connection.
And yes I can be wrong because I am human, laugh. But based on my experience I am not.
J. :good:
Click to expand...
Click to collapse
My phones Sim is a LTE enabled sim. What i need to know if theres a special TABLET option that needs to be enabled on the sim for it to work in the tablet. Theres mixed answers around the web.

[Q] After unlock, only edge.

So i recently unlocked my phone, as am in Europe and now, with two different carriers all I've been able to receive is edge on the network. My imei code is still there when i do *#06# and I don't know if I messed my phone up because I cannot test it on T-mobile's network. Any clue one how to fix? The phone is currently running Stock 4.1.2 with root, because I downgraded to unlock. Any help is greatly appreciated.
Have you checked if the networks are compatible with the other bands?
serio22 said:
Have you checked if the networks are compatible with the other bands?
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No? could you please provide more info on this?
Look up what frequencies the network providers support for 3g/h/4g or whatever, then see if your device supports them. If not, then what's why you only get edge
Late reply, but this phone is for T-Mobile and Videotron/Wind AWS networks; it will not work on European frequencies other than GSM unfortunately.
European with an American phone here! Been using the d2tmo (T999) for a few years in Europe and it is certainly possible to use data connections greater than edge. I am using 3g all the time and in various countries around Europe (no lte here yet). The problem might have been that:
a) the area where you were did not have 3g coverage, only edge - old cell phone towers perhaps?
b) your signal was too weak - in this case the phone will shift down to edge rather than using faster methods of connection
c) your provider only allows you to use lower speeds (for example in some countries O2 provides first 150 mb of the day at high speed and then reduces the speed by switching you to edge)
d) make sure that you have all network connections enables in settings-mobile networks-network mode. also enable data roaming just in case
I'm no expert in this field, but I have had similar issues before and these have worked for me. Good luck!

Using this phone on AT&T, can't get 3g data

I cancelled service with verizon, and put my att sim card into this phone.
But the best data connect I can get is edge (2g). I don't expect this phone to get ATT's lte network, but is there a way to get 3g data connection? Edge is just too slow.
Also, is voice quality tied with network type? I feel the voice quality was worse in comparison to my ATT phone. But the signal shows full bars.
Thanks.
Edit: today it magically worked. I don't know what happened, as I didn't do anything to it. It is now running on HSPA+, with very nice speed.
whatever100 said:
I cancelled service with verizon, and put my att sim card into this phone.
But the best data connect I can get is edge (2g). I don't expect this phone to get ATT's lte network, but is there a way to get 3g data connection? Edge is just too slow.
Also, is voice quality tied with network type? I feel the voice quality was worse in comparison to my ATT phone. But the signal shows full bars.
Thanks.
Click to expand...
Click to collapse
Did you configure the right APN settings for AT&T?
https://www.att.com/esupport/article.jsp?sid=KB424489&cv=820
konradsa said:
Did you configure the right APN settings for AT&T?
https://www.att.com/esupport/article.jsp?sid=KB424489&cv=820
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Click to collapse
Yes, after setting it up I was able to connect to EDGE. But that is only 2g speed. I read online that many people were able to connect to 3g (HSPA+).
Some of them mentioned reporting IMEI to ATT. Would this matter?
whatever100 said:
Yes, after setting it up I was able to connect to EDGE. But that is only 2g speed. I read online that many people were able to connect to 3g (HSPA+).
Some of them mentioned reporting IMEI to ATT. Would this matter?
Click to expand...
Click to collapse
Try to call ATT and make sure they provision your SIM card with 4G LTE service. (you might need an IMEI that is compatible with ATT LTE for them to activate that option)
sorry wrong post

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