How to make power off the cellular network when Wi-Fi connection?

The phone is only needed for Internet messengers and rare outgoing calls (incoming). So you need not to fall asleep wi-fi module and disable the SIM card when you are connected to the Internet via wifi.

The house have wifi, when the phone is connected to the SIM card is inactive.
We leave the house, wifi is lost, the SIM card is included with a forced LTE.
We reach the office, working solo caught, the SIM card is deactivated.

+ it would be nice to wifi checked for the presence of the Internet. and along the way you pass a cafe where a friend will be an open network, but will not have the Internet without logging in to some advertising page

The smartphone hasn't purchased, so any top will fit, but what a difference — it's not based on the version of Android?
June 27th 19 at 15:33
2 answers
June 27th 19 at 15:35
Classic version - Tasker
June 27th 19 at 15:37
Why ?? In the presence of Wi-Fi Internet routing is redirected to it and mobile Internet is not working. only the icon is lit.
Important — disable the SIM card. So incoming calls are not passed.

That is, the SIM card is only needed to maintain the Internet when wifi is not in the path - Trudie_Kunze73 commented on June 27th 19 at 15:40
: well, for this sort of thing already suggested Tasker.

much alternative SIM card with disconnected calls, i.e. it only in the raw footage you can climb. - Sandra_Kautzer42 commented on June 27th 19 at 15:43
outgoing is sometimes needed, so would the SIM card from the tablet put - Trudie_Kunze73 commented on June 27th 19 at 15:46
If the aim is not to save battery and to not pass incoming - do unconditional forwarding to number which is always off, listen to his answering machine. - Laney_Stros commented on June 27th 19 at 15:49

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