I still have my phone with me when I leave the house, but because now I work from home and don't need much mobil data, I downgraded my data plan to 250mb per mo

I still have my phone with me when I leave the house, but because now I work from home and don't need much mobil data, I downgraded my data plan to 250mb per month. I can see at some point I'll try to open a menu but won't be successful