A cellular network or mobile network is a radio network distributed over land areas called cells, each served by at least one fixed-location transceiver, known as a cell site or base station. In a cellular network, each cell uses a different set of frequencies from neighboring cells, to avoid ...

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26
votes
3answers
40k views

How to disable captive portal detection? How to remove exclamation mark on Wi-Fi or signal icon in Lollipop?

When connected to the Internet, the system checks if it's in a walled garden, which is simply trying to connect to Google. If it fails, in Android 5, there'll be an exclamation mark on the WiFi icon ...
25
votes
3answers
57k views

How can phone companies detect tethering (incl. Wifi hotspot)

Mobile network operators (also: telephone companies, telcos, providers) sometimes offer low cost data packages that are usable only on the phone. Or so, they say. How can they distinguish between a ...
18
votes
3answers
62k views

What does the “Aggressive Wi-Fi to Cellular handover” option in Developer Settings do?

In Android Lollipop 5.0, I noticed that "Developer Options" features a checkbox for "Aggressive Wi-Fi to Cellular handover" that is unchecked by default. Does anybody know what this setting does and ...
8
votes
1answer
323k views

What is the difference between GSM and WCDMA when switching to manual Network Mode?

I was reading this answer and I need to comprehend this better: What is the technical difference between "selecting GSM" and "selecting WCDMA" in Network Mode settings menu? To save battery life, I'm ...
7
votes
1answer
24k views

Samsung Galaxy S3 keeps losing network connection and need to restart phone to reconnect

I've had my S3 for around 6 months and never had a problem. But in the last couple of days it seems to be randomly losing connection to network (T-Mobile): I have to restart my phone to reconnect. ...
6
votes
1answer
2k views

Network Connectivity in GSM/WCDMA mode

I am using a Samsung Galaxy S Duos S7562 with Android 4.0. Whenever I disconnect a call, the network vanishes for a few seconds when the phone is in GSM/CDMA auto mode. The network is fine in GSM only ...
6
votes
1answer
19k views

Unable to enable Mobile Network settings (options greyed out). Is there any way to restore lost mobile connectivity data?

I have a HTC Desire HD that up until recently has been running well with a custom ROM. For some reason, the phone started to "misbehave" in a number of ways after about 10 months of painless operation,...
5
votes
4answers
1k views

how can android keep a TCP connection alive when changing network provider?

i'm curious about how android can keep a TCP connection alive while i'm switching from 3G ( mobile data ) to WiFi and viceversa. i'm asking this after i seen that i had an uninterrupted radio stream ...
5
votes
1answer
27k views

Android 4.3 - No internet access, unable to connect to the proxy server error

My Lg nexus 4, received the android 4.3 update last night. I didn't do much on it, opting to sleep peacefully knowing that I had the latest and greatest in android software, but this morning I noticed ...
5
votes
2answers
12k views

Why doesn't my SIM card does allow a connection to this network?

In Android 2.2 from a HTC Desire Z I am frequently finding my phone disconnected from my mobile provider. When I select my provider from the Settings -> Wireless & networks -> Mobile networks -> ...
4
votes
6answers
19k views

Some app keeps turning on mobile data

There is some app that turns on mobile data. I turn it off but on sleep or power up it is back on. It is very annoying and potentially costly since I do not have a data plan. (this seems like an ...
4
votes
1answer
5k views

Power Efficiency: Network mode 4G LTE vs 3G GSM/WCDMA?

Which network mode is more power efficient: LTE 4G or GSM 3G? I assume using a 4G network uses more power even if you don't use the data connection, as from the little I understand about mobile ...
4
votes
1answer
2k views

DNS blocking on mobile networks?

I'm using my HTC One phone on Sprint's network in NYC, and noticed that my phone cannot access Imgur. On Chrome, when using mobile data (3G/4G): http://i.imgur.com/TDvhBMA.jpg Fails to resolve "i....
4
votes
0answers
203 views

Aggregating two 4G/3G data links from 2 different sims?

Having two 4G capable sims -from truely two different operators (no virtual carriers at all)- and a Dual Active sim phone (Zenfone 2 Laser), I want to do true load balancing with a 1 sim + 1 sim 4G/3G ...
4
votes
2answers
5k views

How to change “Preferred Network Mode” using adb without reboot?

I'm trying to change my phone's (CM 12, Stock 4.2, both rooted) preferred network mode from "GSM/WCDMA" (0) to "WCDMA only" (2) and vice versa (there can be other modes too), using command-line only. ...
4
votes
2answers
4k views

Android lollipop Nexus5 mobile network exclamation mark

I am using nexus5 and I have never had problems using mobile data network. Some days ago I updated to 5.0.1 and problems started occuring, exclamation mark on mobile network icon, internet stopped ...
4
votes
0answers
731 views

How can I change preferred network type through a script (or terminal command)

I'm currently attempting to create a workaround for a problem that is plaguing a ROM that I'm using. While my phone and ROM are capable of using LTE, and use it perfectly fine, the "preferred network ...
4
votes
1answer
5k views

3g network connection Problem while using data

For last two months or so, the situation in my two years old international HTC One X is that the data is not connecting when it is on 3g network but it is working absolutely fine with 2g network. when ...
3
votes
1answer
252 views

is AT&T network possible on the Droid a855?

Is it possible to use AT&Ts network on the Droid a855? At all possible? Tough to find a direct answer on the web for some reason. Thanks!
3
votes
1answer
2k views

How can applications be installed on SIM and how do I view and disable them?

I've got a new sim card. After it found the network, soon I've got an sms (supposedly from my operator) saying: Dear client! We are installing applications on your sim card for free. Please enable ...
3
votes
1answer
2k views

Configure Android for ONLY IPv6 on T-Mobile

I figured out how to configure a dual-stack IPv4/IPv6 "Access Point" for T-Mobile connectivity on my Samsung Galaxy Nexus, with stock Android 4.2.2. For some reason, when I visit http://myglobalip.com,...
3
votes
2answers
72 views

Missing 2G only on my Galaxy s4 I9505 on lollipop

I have a problem with receiving calls and text messages due to a weak 3G signal, now I want to make my phone and force it to work on the 2G mode only, but since I am on lollipop 5.0.1 I don't have ...
3
votes
2answers
716 views

Why does my phone say I am roaming when connected to my “home” network?

I recently got a new phone, the Elephone P7000 and it runs stock android 5.0. Everything seems to work perfectly apart from the fact that most of the time the top status bar says I am roaming. When I ...
3
votes
3answers
3k views

data packet automatically activated on gingerbread 2.3.6

I just upgraded my samsung galaxy SL to gingerbread 2.3.6 After that, everytime my data packet is automatically activated all the time. I switch off my mobile network data and lock my phone, and then ...
3
votes
0answers
55 views

My cellular networks slower than USB tethering, what shoud i do?

In the first glance to my title, it doesn't really make sense because the hotspot itself should equal/faster than the client who borrow/tether the network, but due to unknown reason, it always slower, ...
3
votes
1answer
493 views

New android user; switching between wifi and mobile data

When I leave the office my S4 doesn't seem to want to connect to mobile data. So, I end up with no connection at all. Turning mobile data off and on does nothing at all, I seem unable to establish a ...
3
votes
1answer
4k views

No Service on Galaxy SL GT I9003

I have a Samsung Galaxy SL running Android 2.3.6. I bought a new battery and it was working perfectly until I put on recharge. Immidiately after I put it for recharge, it started showing "No Service"....
3
votes
3answers
5k views

My phone not registering to 2G (GSM only) network

I am using a Sony Xperia Neo L (MT25i). After updating the OS, my phone not registering to 2G (GSM only mode) network. It works perfectly with 3G (WCDMA only or WCDMA proffered mode) network. While ...
2
votes
1answer
691 views

Will the HTC Thunderbolt be able to use AT&T's network?

I'm speaking from a hardware perspective. It supports the 850 and 1900 network bands that AT&T uses, but will it work? The phone is amazing, absolutely destroys the Inspire 4G (which is a complete ...
2
votes
1answer
7k views

What are the technical differences between 1X and 3G on Verizon's network?

My Android device (on Verizon) will sometimes display 3G in the status area, and sometimes display 1X. What do these indicate, and what is the difference?
2
votes
1answer
6k views

How to display current location on the home screen?

In my old phone I had a setting called "Area Info - cell information". When enabled it would show the location information next to the mobile network name, like: Vodafone Foobar Street I can't ...
2
votes
3answers
38k views

Enable Location Services via Remote Control

I always disable (Google) Location Services on my phone because they are always drain a lot battery (probably because my mobile Internet is very slow). But in case I lose my phone I can't use any ...
2
votes
1answer
129 views

Can cellular network providers detect the phone model/make when their sim is activated?

When the user inserts the sim card and activates, can the cellular network provider detect what phone the user uses? Like say Motorola Droid. Or at least the phone is a smartphone or not?
2
votes
1answer
2k views

Limit download rate in android? [duplicate]

I have an irritating friend of mine who has evil eye on my unlimited data plan. I have a few time asked him to do his own recharge but he tends not to. It's so irritating when he asks to tether. Can ...
2
votes
1answer
1k views

What is the mobile provisioning website supposed to do?

When I go to Settings → More... → Mobile plan it gives me a message "{mobile operator} has no known provisioning website". Digging into Android source code for WirelessSettings.java I found how URL ...
2
votes
1answer
2k views

Change mobile network DNS on Lollipop and up

Ok, this is a constantly asked question, how to change mobile network DNS. But in different Android version, you will get different method. So this is the reason I ask this. I have already known a ...
2
votes
2answers
8k views

4G mobile data being used even when mobile data setting is off?

I have a Motorola Moto G, the 4G version, with the original ROM upgraded to the latest version (4.4.4 official from Motorola). The first thing I did when I got it was the same I have done when I got ...
2
votes
1answer
300 views

How do I change DNS settings for 3G? [duplicate]

So I can use Twitter. It is okay when I use WiFi. But in 3G I cannot change DNS.
2
votes
1answer
6k views

Does installing CyanogenMod lock device's network?

today after almost one year using the stock Android version on my Xperia Mini (ST15i, I was on Gingerbread) I decided to flash an official CyanogenMod ROM (CM7). So I first unlocked the bootloader of ...
2
votes
0answers
36 views

Nexus 4 3G not working

The phone is running AOSP Marshmallow, it is rooted and has Xposed installed. Mobile operator is Latvian Mobile Phone with working data plan. I can send and receive calls and texts and use WiFi. So ...
2
votes
1answer
1k views

How to lock network operator or to never go on roaming, or get out of roaming as soon as possible

I work really close to a country border, and I do NOT want my phone to connect to other operators than mine. Sometimes the operator from my home country will be unavailable for a brief period of ...
2
votes
0answers
823 views

“Data roaming” unchecked but connected to foreign network for data anyway

I am using a Galaxy Nexus LTE running Jelly Bean 4.2.2 with service from Verizon Wireless in the U.S. In Settings > Wireless & Networks > Mobile networks, I have: Data enabled: on Data roaming: ...
2
votes
0answers
38 views

Battery percentage going down while charging! [duplicate]

(device: Samsung Galaxy S 3) I've just witnessed something rather strange: while tethering to my laptop, with the phone being plugged in a power source (the charger I got with the device) - the ...
2
votes
0answers
3k views

My Google Nexus S won't connect to network

I have a problem with my Google Nexus S. Yesterday I was out in the city and my battery meanwhile died and the phone shutdown. The next day when I charged the phone, I noticed that it is showing no ...
2
votes
1answer
2k views

Samsung Galaxy Nexus 4.1.2 Unable to connect to mobile network

I recently purchased the handset from the US and currently using it in Vodafone (India) . I upgraded the firmware to 4.1.2 it was working fine and then all of a sudden I am not able to connect to any ...
2
votes
1answer
4k views

Mobile network turns on by itself after Android 4.0.3. update

I'm having HTC Sensation and I use wi-fi on a regular basis instead of mobile network (bad data plan). For the old Android version there was no problem, I just switched of background syncing and set ...
2
votes
4answers
55k views

Can't download apps from Google Play store via mobile network

I have a Sony Xperia sola in Egypt. I bought it with Gingerbread, then I upgraded to ICS 4.0.4. After the upgrade, I became unable to download any apps from Google Play using my mobile network, and ...
1
vote
2answers
19k views

What is the difference between dual sim active and dual sim stand-by?

I am Using Sony Xperia Tipo Dual, which is Dual Sim Smartphone, but When i use internet from SIM 1 using Network Mode = GSM only or WCDMA/ GSM the another SIM's says NO NETWORK. When i deactivate my ...
1
vote
1answer
4k views

Difference between preferred network types

What's the difference between GSM, CDMA, WCDMA, EVDO, and LTE? How do they relate to the network icon labels? Which one is 3G? Which ones are E, H and H+?
1
vote
3answers
4k views

Is it possible to set DNS for mobile network

I live in Canada and use an unblocking service to access US Netflix content, Pandora and Hulu. I would like to be able to use this service while not on my WiFi is there a way to set the DNS server to ...