OP asked aboutgetting a new SIM with a brand number with 8.99 deal and then changing that LIDL SIM to their old number after a few weeks - it doesn't state anywhere that that is possible for keeping the 8.99 deal so I said "Not necessarily"Where are you seeing that porting a number over at a later date might jeopardise qualification for the €8.99 p.m. offer? I can't see that anywhere. The phone number associated with a Lidl Plus account can be changed via the app.