Something on my smartphone sends a message once a day, sometimes I see a tiny fast dark background popup on the bottom saying it is doing so.

Such application seems related to the SIM card, as the popup I receive is from my cell phone provider/carrier/operator.

One second later I receive this:


The app name is "Serviços TIM".
That app package name is "com.android.stk" (I found that using Brevent).
It is an OS App.
It has the exactly same version of "SIM ToolKit" (I guess .stk means that), but at apps list it is in an independent entry with it's own options.

The real huge problem is that, when that popup shows and the screen is locked and remains like that for 8h+, the screen WILL NOT TURN OFF and will spend my battery from 100% to 40% or less and I may depend on having the battery at that time! :(. I usually let it out of the charger, and without that popup it would only spend about 5-10% of the battery.

My smartphone J7 is not rooted, I wonder if that would be the only option?


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This other app I think is the culprit from sending the message. It already had SMS disabled but not the phone permission! (I have other app to let me read/send SMS btw)
enter image description here

also the SIM toolkit, I force stop it (and disabled all notifications now 2019):
enter image description here

Final result is: none of these actions above worked, the popup still happens :(

  • 1
    Might also help if you could edit your post and include a translation of what that message says. To me it almost looks like some malware proposing you should install it, making an abonnement for some WhatsApp crap. Then all you'd do is pay, but never receive anything in return. // Try that app @beeshyams mentioned. From what I understand, it looks like "malware advertising". – Izzy Jun 23 '18 at 11:05
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    @Izzy If not a malware, this could be the work of the system app called SIM Toolkit. There have been cases when it was abused by carriers to spam with ads. – Grimoire Jun 23 '18 at 12:22
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    @Izzy I'm rooted, and I completely eradicated the app. Its purpose is only to interface with old-style WAP offerings, so you can either disable or uninstall it without side effects. See here for more info about STK. – Grimoire Jun 24 '18 at 8:15
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    @Izzy sure! but I am still testing. It was happening once a day. Yesterday didnt, what was great. Now I need to reboot, and see what happens, but I need to wait at least one whole day to be more sure. Half of my question (the update part) is actually the answer... so I can just move and complete it later. One good this is, after one day the force stopped ones didnt auto restart, what helps. But as they will after reboot, I can narrow the correct answer based on it. – Aquarius Power Jun 25 '18 at 13:31
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    Take your time! Better a few days later and correct, than fast and missing important things :) When done, please ping me for comment cleanup (and make sure the relevant parts of the comments are in your answer before I purge them ;) – Izzy Jun 25 '18 at 13:35

I managed to minimize the problem by using the "do not disturb" feature.
By "minimize" I mean that if I am using the phone the popup will still show up, otherwise it wont mess it's battery (neither show up).
I can allow all exceptions least "reminders" apparently.
Obs.: "do not disturb" is not 100%, I think about 10% of the times it will still allow that abusive popup to keep the screen ON for many hours!

The simToolkit app package "com.android.stk" (which I found out using Brevent), is called "Serviços TIM" and seems to be a mirroed/dup (???) package from the default simToolkit.

My next step (as soon that popup annoys me enough) is to try to uninstall that package by using this tip by @Izzy, thx!
How to remove the SIM Toolkit from my phone? (Without root or flashing any ROM)
adb uninstall failed
Uninstall via adb without root
How to disable Google Apps in Mi Phones
Did it finally:

adb shell pm list packages |grep stk

adb shell pm path com.android.stk
adb pull /system/app/Stk/Stk.apk # to backup it just in case

adb shell pm path com.android.stk2
adb pull /system/app/Stk2/Stk2.apk # ...

adb shell pm uninstall -k --user 0 com.android.stk
adb shell pm uninstall -k --user 0 com.android.stk2

It seem to me like a flash message. These messages contain only two options- Cancel and OK. If you press OK, the plan mentioned in the message will get activated and it will cost you some money. This can be very irritating.

You can deactivate Flash messages but the process is different for different service providers

you can find the ways to stop flash messages in other operators here and have an idea about your own service provider.

  • Please see android.stackexchange.com/help/referencing – Firelord Jun 27 '18 at 11:46
  • There is no app "SIM Toolkit" here that I can run (it is on the configuration that shows the list of apps but not accessible/runnable as a normal app, I dont understand why they do that...), but there was the "ServiÇos ..." one! but it hadnt equivalent option... – Aquarius Power Jun 28 '18 at 13:28
  • This is definitely flash SMS that you are receiving because it contains information about some calling plans. Is there any other SIM/operator related application on your device? – Chandrani Chatterjee Jun 28 '18 at 13:37
  • does flash SMS comes thru CellBroadcasts? if so, I got a tip about SMS app where I can disable it, still testing what happens tho. I also deactivated all I could from SIM Toolkit about notifications in popups. I will add some info to the OP btw :) – Aquarius Power Feb 19 '19 at 2:26

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