Tips to extend Galaxy S7 battery life, other issues

Today, having the best smartphone does not necessarily translate to longer use or fewer charging times. Most of the time, users are still facing battery drain issue whether they have a cheaper gadget or the latest #GalaxyS7. Battery technology still badly needs improvement. In this material, we give you a short list of practical tips to extend Galaxy S7 battery life as well as solutions to other Galaxy S7 and S7 edge issues.


  1. Galaxy S7 Edge cannot connect to secure Wi-Fi | Galaxy S7 Edge “Authentication Error occurred” when connecting to Wi-Fi
  2. Galaxy S7 messaging app won’t allow attachment in a text message
  3. Galaxy S7 doesn’t remember Wi-Fi settings after reboot
  4. Galaxy S7 cannot connect to hotel Wi-Fi
  5. Tips to extend Galaxy S7 battery life

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, or you can install our free app from Google Play Store.

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.

Problem #1: Galaxy S7 Edge cannot connect to secure Wi-Fi | Galaxy S7 Edge “Authentication Error occurred” when connecting to Wi-Fi

Phone wont connect to secure corporate Wi-Fi (keeps telling me “Authentication Error occurred”) even though my credentials are correct and I have verified with our IT that the system is not rejecting me and I have correct username and password. I can connect to our unsecure guest network and my own home Wi-Fi like normal. It is just our secure staff network that is causing the problem. It uses 802.1xEAP and has MSCHAPV2 phase 2. I have tried connecting with out the phase two and with and neither work. (my boss is able to connect to the network and she has also has a Galaxy S7 edge with the same version of Android and everything.) Any help would be super appreciated.

I have tried everything i could find online : rebooted phone, toggled Wi-Fi and Bluetooth, booted to safe mode, turning off smart switch and auto connect. forgetting network and re-adding it, and a few other things. — Jacob

Solution: Hi Jacob. First of all, we assume that when you say you are unable to connect, it means that your S7 edge is unable to establish a local connection to a particular access point or router at work and that everytime you attempt a connection, the “Authentication Error occurred” message pops up. This is an important starting point we need to establish in this brief explanation about the issue.

It’s impossible for us to know what the exact problem is but if we consider the error message you’re getting, “Authentication Error occurred,” it tells us that  the process of comparing the credentials you’re entering (username and password) with a list of authorized users in your corporate authentication database fails. Authentication process in a corporate setting is usually handled by an authentication server that provides authorization to a device that supplies correct credentials. The process is automatic and is obviously handled between machines after you hit the OK button to enter the credentials. Every time your S7 edge returns an authentication error, that’s a confirmation that you are not providing the correct username and password because the authentication server cannot find them in the database.

We know you’ve already checked with your IT department about this but they should have helped you fix it. This is not an S7 problem and must be resolved by your company IT guys. To demonstrate our point, do a factory reset on your S7 so that it runs a clean software. Once you’ve done that, connect to your network again to see the difference. Make sure that you don’t install any app to eliminate the possibility of a third party app (like firewall apps) from interfering. For reference, here are the steps on how to do a factory reset on your S7 Edge:

  • Turn off your Samsung Galaxy S7 Edge.
  • Press and hold the Volume Up, Home and Power keys together.
  • When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
  • Wait until the Android Recovery Screen appears after about 30 seconds.
  • Using the Volume Down key, highlight the option, ‘wipe data/factory reset’ and press the Power key to select it.
  • Press the Volume Down button again until the option ‘Yes — delete all user data’ is highlighted and then press the Power key to select it.
  • After the reset is complete, highlight ‘Reboot system now’ and hit the Power key to restart the phone.

Remember, factory reset will wipe your phone clean. Make sure that you create a backup of important files before you proceed.

Problem #2: Galaxy S7 messaging app won’t allow attachment in a text message

Ok. So everything was fine up to last night. Now, whenever I want to attach something to a text message, the options for attachments (camera, gallery and one more thing) comes up and immediately closes the texting app before I can attach anything. I can see it loads the camera submenu and the camera is active, but it closes the whole app before I can do anything. Sometimes there is an error messages but it closes as well so it’s there too briefly for me to read any of it.

If it helps, last night, right before that, was the first time I tried taking panorama pictures with my phone (like hours earlier) and it worked fine before that. Now how do I fix it?

Thanks!! — Marc-Andre

Solution: Hi Marc-Andre. This issue may be caused by a messaging app bug so the first thing that you want to do is delete its cache and data. Here’s how it’s done:

  • Go to Settings.
  • Proceed to Applications.
  • Select Manage Applications.
  • Tap the All tab.
  • Choose the name of the app that has been going rogue.
  • Tap Storage.
  • From there, you will see the Clear Cache and Clear Data buttons.

We suggest that you do the Clear Cache first. After tapping the button, go back to the messaging app and check if it’s now working. If doesn’t work still, proceed to deleting the data. Keep in mind that clearing the data is the virtual equivalent of re-installing the app. That means that the procedure will wipe your text messages. Be sure to create a backup of your important text messages first.

Problem #3: Galaxy S7 doesn’t remember Wi-Fi settings after reboot

I’ve been having a problem with my Wi-Fi since about November last year and have looked all over the internet for a solution, but have not been able to find anyone with similar problems.

Firstly, it takes forever to turn Wi-Fi on (about a minute I would say).

Secondly and more important, every time my Wi-Fi turns off my phone forgets every “new” Wi-Fi network I have added since about November (whether I turn it off myself, turn off my phone, restart my phone or go into airplane mode).

I thought that my phone has too many Wi-Fi networks stored and deleted a few, but that did not help either.

So basically every time after my Wi-Fi was turned off for above mentioned reasons, I have to enter the password again to several Wi-Fi networks that I started using at the end of last year.

Do you guys have any idea how this could be solved?

Thanks. —  Stan

Solution: Hi Stan. The behavior of your phone is clearly not normal (unless you opt not to “remember” the Wi-Fi settings of a network everytime you connect to it) and may be caused by one of a few things. The first step that you want to do is to see if it’s caused by a bad system cache. Wipe the cache partition and see how it works. Here’s how it’s done:

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

If that won’t help, it’s possible that a third party app or an unknown firmware glitch is deleting the folder that contains your phone’s Wi-Fi settings every time you reboot it. The folder for Wi-Fi settings can vary by firmware version but it’s commonly located here: /data/misc/wifi/wpa_supplicant.conf. To check if our hunch is correct, do a factory reset and observe the phone afterwards. Like what we suggest above, make sure that you don’t install any app during the observation period to see the difference.

If an app is not responsible for this issue, factory reset may help restore that default behavior of the phone, or eliminate the bug that may have developed over time.

Problem #4: Galaxy S7 cannot connect to hotel Wi-Fi

Hi. I would be interested in your comments about a Wi-Fi problem I recently encountered with my Samsung S7.

Normally it connects to Wi-Fi without a problem. I was staying in a hotel in Vienna. the indication was that there was a strong connection to the hotel’s Wi-Fi, but I could not get any internet access with any application. My wife has a £20 Android phone and she could connect with no problems. Also, I could connect to various public Wi-Fi networks in Vienna without problems.

The research I have done so far indicates that a change in Wi-Fi mode at the router may solve the problem, but obviously I did not have that option.

Just in case it is an issue the smart switch option was turned off.

I tried restarting the phone many times to no effect.

I have occasionally encountered similar problems connecting to public networks in England but did not then have an alternative phone to try it on, so just put it down to poor transfer rate.

Thank you in anticipation of your help. Regards. — Norman

Solution: Hi Norman. Like Jacob’s issue above, you must let the hotel where you’re staying at know of the problem so they can let you connect to their Wi-Fi network. If your phone’s Wi-Fi works fine with other networks, that means that your device does not have a problem. Troubleshooting your S7 won’t fix the issue and we know that the hotel’s Wi-Fi seems to be in order because another device can connect to it. That only leaves you with one possible cause — there must be some authentication or authorization issues that only the hotel’s staff can fix.

Problem #5: Tips to extend Galaxy S7 battery life

Dear DroidGuy. Thanks a lot for your great informative website. I’ve already found a lot of potential help for my issue. Unfortunately, I’m still stuck with it today. Let me outline what the issue is.

I have a Galaxy S7. One day, I had a weird issue. my phone was rebooting almost every time I was starting my browser. After some updates, it seemed slightly better. After some more time, the same issue happened again and became worse over time. Soon, my phone was rebooting every now and then, irrespectively of my browser this time and the time in between reboots was getting shorter and shorter. Plugging my phone during my web browsing seemed to be doing the “trick” for a while again, but at some point it just didn’t work anymore and in the end I couldn’t even neither boot, nor charge my S7.

I think the issue is with my battery and I may have to have the phone checked. So my question is the following: is there anything I can do to prevent my battery from getting used so quickly? Thanks ahead for your help. Regards. — Cyril

Solution: Hi Cyril. Many people nowadays have a mistaken idea about the power source of their smartphones. There’s a misconception about smartphone battery being able to provide power … forever. Well, forever is of course an exaggeration but it’s undeniable that many smartphone users, regardless of what platform they have, that thinks their device’s battery should work just fine after using it for some time. While it’s true that any decent Lithium-ion battery like the one on Samsung phones should work properly for over a year, the fact about capacity decline over time seems lost to many.

The thing is, any Lithium-based battery loses capacity to hold a charge every time a user charges and uses it. The process of charging and discharging (using the device) is called charging cycle. A lithium-ion battery’s performance degrades after every charging cycle although an everyday user will not notice the difference right away. A heavy user will usually notice the degradation after six months or a little longer as the device needs to be charged more often. In other words, the more often you charge and use your phone, the shorter the capacity of your battery becomes. If you charge your phone everyday because the battery drains so fast during the day, you can bet to experience battery issues in a matter of few months. That’s the reality of today’s smarphone battery. Again, this is true for all smartphones and not just for Samsung devices. A much better battery technology is yet to arrive to improve this situation so users of even the most advanced smartphones like the Galaxy S7 should resort to using smarts to remedy the problem.

And speaking of smarts, below are the things that can significantly improve battery drain issue you’re having.

Use power saving mode

Samsung recognizes fast battery drain as one of the weaknesses of its devices, particularly the power-hungry Galaxy S and Note series, so it offers readily available remedy — power saving mode. In the Galaxy S7 and S7 Edge, you have two options so drastically save power — Power saving mode, and Ultra power saving mode. The latter is more effective in saving power by sacrificing features that makes your S7, well, a smart phone. However, if you keep on losing power fast throughout the day but still wants to use your device for basic services like texting and calling, be sure to use any of these modes. Remember, the fewer the charging sessions, the longer your battery life will be in the long run.


Change sync frequency of apps

One of the main reasons why your phone only last hours after a full charging session is due to apps. To be specific, we are talking about apps that constantly talks to existing or non-existing remote servers. Examples include social networking apps like Facebook, Twitter, Snapchat, Whatsapp, emails, and other similar ones. Instead of letting your apps sync automatically, we suggest that you change sync frequency to manual.


Disable haptic feedback and vibrate

Vibration uses more power than a simple beep notification so it doesn’t take a genius to turn it off, especially if you’re looking for a long day ahead of you.


Turn off unnecessary services

Leaving GPS, WI-Fi, Mobile data, Bluetooth, etc running even when you’re not using them all contributes to total battery loss in a day. Anything that runs in your phone, be it a service or an app, requires computing power, which in turn burns the life of your battery faster. Make it a habit to turn these things off to save power.


Lower screen brightness

Many people love Samsung devices simply because they sport lovely, bright, and colorful screens. Well, that’s true. But having a colorful display also sucks a lot of battery power. If you are the type who wants to enjoy a bright screen, you can do at the expense of your battery level. If you can’t sacrifice your pleasure by lowering screen brightness to the lowest comfortable level, nothing can help you. Contrary to what many people believe, there’s no app in the world that can resolve a battery drain problem if your screen is in full blast all the time.


Due to space limitation for every article, we can’t give all the things that you can try in order to improve the battery situation you’re having. We recommend though that you do further research online as there are many other in-depth materials dedicated to this topic. We hope though that we’ve covered the basic tips to extend Galaxy S7 battery life in this post.


Related reading: Charging Samsung Galaxy S7 Edge battery & tips to prolong battery life


Engage with us

If you are one of the users who encounters a problem with your device, let us know. We offer solutions for Android-related problems for free so if you have an issue with your Android device, simply fill in the short questionnaire in this link and we will try to publish our answers in the next posts. We cannot guarantee a quick response so if your issue is time sensitive, please find another way to resolve your problem. 

If you find this post helpful, please help us by spreading the word to your friends. TheDroidGuy has social network presence as well so you may want to interact with our community in our Facebook and Google+ pages.