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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2
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1answer
3k 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 ...
1
vote
2answers
12k views

Losing network operator on Samsung Galaxy SIII mini

For some time now (I think it's from the latest Android update) I have this problem, that time to time (on daily basis) people can not reach me, like I would lose connection to the Network. I get an ...
1
vote
1answer
30 views

What range of tcp buffer size do you suggest for slow and fast networks?

If you search the net, you come across with ranges like these that claim would enhance your net throughput: net.tcp.buffersize.default=4096,87380,256960,4096, 16384,256960 ...
0
votes
0answers
27 views

Moto G 2nd Gen can't connect to the Internet when switching from 3G to 2G

I got a new Moto g2.When using the device with 3G, it works great. But when I switch to a 2G network, the internet connect stops working after a few seconds. Why is this happening?
0
votes
0answers
17 views

How to reset network settings on android?

I recently reset my phone to factory settings and now i am having network issues,I can't make or receive calls even when signal of my sim are full,only occasionally i can do it.Its not a problem of ...
1
vote
2answers
28 views

Can Telegram notifications be disabled?

Can you disable Telegram notifications somehow? I am seeing a huge battery consumption since last few weeks and after upgrading to Android 5.0.2. After one day of use battery app is reporting that ...
-1
votes
0answers
21 views

How does RMNET work and why don't I see a “10s” address in ifconfig

I was poking around my rooted HTC M9 and I noticed when running a busybox ifconfig that I had only two main interfaces, rmnet_data0 and rmnet_ipa0. rmnet_data0 had a single public IP address on it. ...
1
vote
0answers
1k views

Tasker (switch off mobile data automatically) causing trouble under CyanogenMod

I used to use this Tasker profile for nearly a year now already and it used to work fine, until I recently switched from the Samsung default UI TouchWiz to CyanogenMod on my Galaxy Note. The Task ...
14
votes
2answers
29k 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 ...
2
votes
4answers
27k 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 ...
3
votes
1answer
3k 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 ...
1
vote
0answers
29 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
1answer
3k 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
1k 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 ...
1
vote
1answer
7k views

Which modem firmware for Samsung Galaxy S (GT-I9000) works best with the mobile networks in Russia?

Trying to use a Samsung Galaxy S device coming from China or Korea in Russia lead to the observation that the quality of the connection to the mobile network is much worse than on Samsung Galaxy S we ...
0
votes
1answer
1k views

Mobile network settings - Not enabled for modifications (Greyed)

I bought a zte v7275 tablet Device information model number - ZTE V7275 android version - 4.0.4 kernel version- 3.0.21-perf-gc8726c4f Flash ROM which is likely to be locked to a single ...
1
vote
2answers
6k views

Signal problem with Samsung Galaxy Y GT-S5630 mobile

I am using Samsung Galaxy Y GT-S5630 phone with IDEA network provider. I am having signal loss problems many times a times. When I try to make a call, it says "Network unavailable". I though this ...
3
votes
1answer
1k 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 ...
0
votes
0answers
4k views

My internet doesn't work on my phone any more

The internet doesn't work on my phone. It worked with my orange sim card and it previously worked with this sim card, the problem seems to have arisen after my number was ported from the orange sim to ...
0
votes
1answer
3k views

No option for “mobile network” on Dell Venue 8

My friend has bought new "Dell Venue 8 3830" tablet with Android JellyBean 4.3. Now we want to connect a 3g dongle (D-Link) via a micro-usb cable which came with it. When i connect the dongle to the ...
2
votes
3answers
3k 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 ...
1
vote
0answers
26 views

How does Android perform Data-Wifi Switch

I am trying to learn from Android source on Data-Wifi automatic switch. The closest I can get is DataCommand and WifiCommand, they seem to switch network preference (through ConnectivityManager), by ...
0
votes
2answers
6k views

Unable to use Network: “Not Registered On Network”

I am using Samsung Galaxy Chat B5330 (officially upgraded from 4.0.4 to 4.1.2). It used to work fine, but since a few days I am not able to call or send sms or use any network related services. It ...
0
votes
1answer
20 views

How to lock android sim network?

I want to manually lock the android sim card network is that possible and how to do it?
0
votes
1answer
50 views

Network App Restriction

I recently bought a japanese cellphone (Fujitsu F-06e NX). It came with some really cool apps but most of them have limited functionality due to network work restrictions (Phone must be on docomo ntt ...
12
votes
2answers
4k 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 ...
0
votes
0answers
2k views

Why isn't my SIM card working after factory reset?

After doing a factory reset on my Micromax Ninja A89(dual sim), I am unable to register on my service provider. Though my sim was working fine on the same device before the reset, but it is not ...
12
votes
2answers
12k 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 ...
0
votes
0answers
20 views

Can I connect Wi fi and 4G at the same time for different things [duplicate]

Is it posible to receive via WiFi data( only receive not send) to transmit later via 4G to internet Is not like hot spot(though maybe this is the name ) I just want to conect a wifi card or any ...
1
vote
0answers
55 views

How can I keep my mobile data connection up when establishing a non-internet capable WiFi connection?

I'm using a Raspberry Pi to stream music wirelessly inside my car. The Pi has a wireless network without real a exit to the outside world. I want to connect to that 'internet-less' network and still ...
0
votes
0answers
75 views

How to diagnose network connection issues?

My phone never connects to the 4G network, despite me being on a 4G plan (it at most connects to H+) and very frequently it'll lose the connection - can't use mobile data, receive SMSs or make phone ...
0
votes
0answers
48 views

ZTE Blade G lux - no network

I have a problem with my brand new ZTE Blade G lux. I bought it from Mexico (from authorized distributor, so that shouldn't be the problem) and it worked well with my mexican sim. When I got back home ...
1
vote
2answers
17k views

Phone won't connect to mobile network

As of yesterday my phone was okay as I know I had a missed call and checked it on voicemail, but today I noticed that it is showing no signal when there should be one. The last thing I know I did was ...
0
votes
0answers
31 views

How to use mobile data just for one application when connected to a specific WiFi network?

My company offer a open wifi, but its proxy blocks one of my application data (Whatsapp). I'd like to use wifi to all apps with only one exception (Whatsapp). My phone is not rooted (Galaxy Note 4). ...
0
votes
0answers
24 views

Automatic Network Searching

In motog2 I am unable to but my phone on automatic network searching when I am in roaming the phone is unable to search the network automatically please help
0
votes
2answers
8k 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 ...
0
votes
0answers
20 views

Will Micromax A1 work with a US SIM card

I have a Micromax Canvas A1, model No. AQ4501, Android Version 4.4.4 with Connectivity as follows. Can I get a SIM card in the US that will work on this mobile? Does WCDMA work in the US? Frequency ...
0
votes
0answers
112 views

Checking for SIM card defects

Short question: How can I obtain detailed information about my SIM card, using Android apps and/or adb (possibly root)? I'd like to diagnose mobile data connection problems possibly caused by SIM ...
0
votes
0answers
91 views

Configuring ssh reverse tunneling on Android 5.0 installed on the Nexus 10

I'm connected to the campus of my university and I know for sure that there is a firewall that blocks a lot of ports and the server does not support the IP forwarding and for this reason I can't give ...
0
votes
0answers
82 views

Disable automatic network operator switch

I have a dualSIM phone with Android 2.3.5. The problem is that it automatically changes the network operator instead of warning me that there is no service. I was selected the operator with "Search ...
0
votes
1answer
2k views

Can't have G,E,3G,H+ in the network bar (thus no internet connection unless on wifi)

I have a new Samsung Galaxy Note 3 Neo, I have a question. Since I bought it 2 days ago, the internet connection is fine (with or without wifi) and it shows either G/E/3G/H+ symbol. But, I once get ...
1
vote
0answers
39 views

Changing the default ports for an application

I have to use a public WiFi service that blocks a number of ports related to online games (Clash of Clans mostly). On a pc this wouldn't be a problem to get around, on a phone though, I'm not so sure. ...
1
vote
3answers
2k views

Mobile Network goes off often in my Galaxy s2

I am using Galaxy s2 since 5 months. I have started facing Network problems recently. The mobile network goes off often and it resumes most times by itself.. but sometimes I need to restart my phone ...
1
vote
0answers
706 views

Lollipop update on MotoG causing no service for sim card

I was using Moto G(1st gen) phone for the past 1 year. I was using 2 sims and I didnt face any problem for 1 year. After getting lollipop update, I frequently get 'no service' for one of my sim. ...
0
votes
0answers
55 views

Nexus 5 - Network/Antenna problem

I am using a Nexus 5 purchased from google and running lolipop OS on Wind network in Canada. Had the service running for 6 months without issues and suddenly it is unable to connect to the Wind ...
0
votes
0answers
124 views

What could explain duplicate network operators being listed on Nexus 5 with Kitkat 4.4.4?

I have recently purchased a Nexus 5 phone using Videotron as my service provider (Quebec/Canada). Videotron has recently launched its LTE network, and ever since I have switched my SIM so that I could ...
0
votes
1answer
205 views

metropcs ZTE no network and doesn't connect,

I recently had to factory reset my phone. Now when I put the SIM card in from my Huawei it won't connect to the carrier data network, it only works on WiFi.
0
votes
0answers
25 views

find which app sync data in roaming

i am facing some issue in Nexus 5. In my phone some apps that used Mobile-Network for syncing the data in background but i don't know. Every 1 hour message is coming with data usage. But i don't ...
0
votes
0answers
126 views

Some applications on my xperia z1 mobile won't be able to use internet over Mobile data where the other apps use it normally

Some applications on my xperia z1 mobile won't be able to use internet over Mobile data where the other apps use it normally. For example I can't use "Facebook" neither "Gmail " where I can use ...
5
votes
4answers
525 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 ...