Galaxy S6 mobile data won’t work in another network, how to configure speed dial, other issues

Are you having one of those frustrating problems wherein your supposedly high-end #GalaxyS6 won’t allow you to use your apps or connect online? This post might help. Keep reading and let us know what you think in the comments below.

If you are looking for solutions to your own #Android issue, you can contact us by using the link provided at the bottom of this page.

When describing your issue, please be as detailed as possible so we can easily pinpoint a relevant solution. If you can, kindly include the exact error messages you are getting to give us an idea where to start. If you have already tried some troubleshooting steps before emailing us, make sure to mention them so we can skip them in our answers.

Below are specific topics we’re bringing for you today:

Problem 1: Galaxy S6 edge mobile data won’t work in another network, how to configure speed dial contacts

I purchased an Samsung Galaxy S6 edge SCV31 from the AU KDDI network provider in Japan two years ago. I unlocked the phone via legal methods and completed all installments and took the device back to my country. Now I need to switch to Vodafone. The SIM works and receives and sends calls and messages, however I can only browse the internet via WiFi connection only. The mobile data does not work even though my Vodafone SIM is one compatible with the device and 4G networks. There is no error message of any kind and I tried to set the access point to the details provided by my current carrier to no avail. What kind of measure should I take?

P.S. The mobile phone still “senses” I am still in Japan. Each time I try to call a local number it gives the international dial assist and asks me if i want to include Japan code +81. — Ahmed Osama

Solution: Hi Ahmed. Using a phone from another carrier can sometimes be problematic. You must accept the fact that some services may not work properly when the device is used outside the original network.

Mobile data can only work if you have an active data subscription from your carrier, and if the phone’s software can be configured properly to allow it. Keep in mind that smartphones built for specific carriers may not be 100% compatible with other networks.

Unlocking your device only means that some network functions, specifically SMS/MMS and voice calling have been allowed. It doesn’t mean however that the software has been modified 100% to that of the current carrier you’re using. Majority of the software is still set to that of the original carrier and in some, mobile data settings cannot be changed at all. This is a common issue with Verizon phones in the US. We are not familiar with the software of your device but if you’re positive that it’s been network unlocked but mobile data is still not working (and even after you’ve configured the APN correctly), that’s too bad. Try to bring the device to a good electronic shop to allow a technician to check it personally. If you’re lucky, they may be able to find a way to customize the software to use your current carrier’s network for mobile data. Remember, checking the software for this case requires some advanced hacking tool that not everyone can get. It’s possible that the software may have been locked permanently that even a good technician may not be able to make modifications to allow it work.

As regards the dialing issue, the cause can still be similar to the mobile data difficulty you’re having. Apparently, the current software is designed to do what it’s doing now, to remind you to if you want to include Japan’s country code first. Try to see if you can circumvent this issue by using speed dial in the Phone app. Here’s how:

  1. Open the Phone app.
  2. Tap the dialing keypad icon at the lower right hand side.
  3. Tap Settings icon at the upper right hand side.
  4. Tap Speed dial.
  5. Add your speed dial contact.

Problem 2: Galaxy S6 signal reception keeps disappearing

I have a Samsung Galaxy S6 unlocked phone with T-Mobile as the carrier. I’ve been having issues with this phone for months. It would randomly restart and be stuck in a bootloop, but I installed an app called Wakelock which seemed to fix this issue. However, last week the phone began losing signal randomly. I got a new SIM card, but still having this issue. And then the signal returns hours later. Not sure how to fix it, because when I turn my phone off to restart it after losing signal, sometimes it doesn’t turn back on at all! — Vaishnavi Kashyap

Solution: Hi Vaishnavi. Like other Android issues, yours is a particularly difficult one to nail because it requires advanced diagnostics to check both software and hardware as well as complete history of the device. We can’t do both obviously so what you can do best right now is to do trial-and-error troubleshooting.

Cache partition wipe

As a first step, you want to check if a cache partition wipe will help. At times, system cache, which is stored in the cache partition, can get outdated or corrupted. To ensure that Android has a good system cache when loading apps, you must delete all contents in the cache partition by doing the steps below:

  1. Turn off the device.
  2. Press and hold the following three buttons at the same time: Volume Up key, Home key, and Power key.
  3. When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
  4. When the Android System Recovery screen appears, release the Volume Up and Home keys.
  5. Press the Volume Down key to highlight ‘wipe cache partition.’
  6. Press the Power key to select.
  7. When the wipe cache partition is complete, ‘Reboot system now’ is highlighted.
  8. Press the Power key to restart the device.

Install Android and app updates

Once you’ve deleted the cache partition, be sure that you then install the latest available Android and app updates. We assume of course that your phone runs the official Samsung or carrier-provided firmware.

If it’s been customized and runs non-official firmware, you should consider reflashing stock firmware on it if you can’t find an updated version. Keep in mind that all community developed firmware are not perfect and can become problematic just like any official firmware that you’re trying to avoid. Since building firmware updates and fixing known bugs require a lot of resources, most of these firmware may be more buggy than official ones.

Also, be sure that your apps are all up-to-date to minimize app-related bugs.

Restart the phone to safe mode

If you impulsively install apps most of the time, there’s a chance the main reason for your issue is app-related. To check, try to restart your phone to safe mode and see if it makes any difference. Here’s how:

  1. Press and hold the Volume Down and Power keys for 20 to 30 seconds.
  2. Once you see the Samsung logo, release the Power key immediately but continue pressing the Volume Down key.
  3. Your phone should continue booting up and you will be prompted to unlock your phone as usual.
  4. You will know if the phone successfully booted in safe mode if the text “Safe mode” is displayed at the lower-left corner of the screen.

Remember, safe mode is not a solution but just a means of checking if your suspicion is spot on. All it does is block third party apps and services. So, if your phone will work normally when its on safe mode, that’s a clear indication that an app is to blame.

By the way, you’ll never see the difference  unless you let the phone run in safe mode for a long time. Be sure to observe the phone while it’s on safe mode for at least 24 hours.

Wipe the device clean

If all else fails, you must do the drastic solution by deleting all user data and returning all software settings back to their defaults. Here’s how:

  1. Create a backup of your files.
  2. Turn off your Samsung Galaxy S6 Edge.
  3. Press and hold the Volume Up, Home and Power keys together.
  4. When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
  5. Wait until the Android Recovery Screen appears after about 30 seconds.
  6. Using the Volume Down key, highlight the option, ‘wipe data/factory reset’ and press the Power key to select it.
  7. Press the Vol Down button again until the option ‘Yes — delete all user data’ is highlighted and then press the Power key to select it.
  8. After the reset is complete, highlight ‘Reboot system now’ and hit the Power key to restart the phone.

Problem 3: Galaxy S6 wifi button won’t turn on

A few months back I was using my Samsung Galaxy S6 to watch Youtube when the video stopped loading. I figured the school shut off their internet so I went to the settings to check. But my phone showed that it had Wi-Fi turned off. I pressed the button to turn it on but it went grey and wouldn’t let me tap it anymore. I tried the one in the drop down menu but it turned a dark shade of green instead of the bright green that shows it’s on. We took it to a local shop who replaced the antenna but that didn’t help and he said it must be a software issue. Samsung won’t help since the phone was rooted but it had been rooted for well over a year before it stopped working. Can you please help? — Robert Haseman

Solution: Hi Robert. Wifi functionality depends not just on the antenna but on other hardware components as well, which can also become problematic. If replacing the phone’s antenna did not help, the technician should have performed other checks on the network chip (which can be very difficult to determine if it’s working or not). We don’t think it’s a software issue since most software problems can be addressed by a factory reset (which you should have done by now).

We suggest that you bring the phone to another service center so more hardware troubleshooting can be done. Otherwise, just replace the motherboard or the entire phone entirely.