How to define a preferred Mobile Network?

Here is the situation: I live close to a border between to countries, one being under EU laws, the other being neutral, except when it comes to economical wars. I have a phone contract in the EU, but I get billed high prices when roaming in the other country. However, in most places where I use my phone, I have access to the EU network where I should not be billed extra at all. I **know** how to select manually the **Operator's Network** GSM network I want from the settings (*Select a Network Operator*), and this is the degraded solution I normally use. Problem is this takes too much time when it detects a bunch of useless operators networks around. --- So I would like to know if there is a way (app, probably), that would make this easy, like "try to use the **Operator's Network** I know is provided in his very location". Making it a "quick setting" would be a must, but probably already addressed somewhere else here. --- ### edit: My phone is not "rooted", so I may not use Xposed features. Using a Macro looks cool, but it would be enough if there was a known shell command to do this. Then I just have to map the command to the macro. Maybe an answer to [this](https://android.stackexchange.com/questions/200862/record-setting-changes-as-script) ?