Orange was formerly known as France Telecome and is one if not the biggest telecommunication provider in France. They operate in Luxembourg under the same brand and you can find stores throughout the country. You can also easily make all orders at their website which is offered in French and English language. Using the website might be your preferred choice as employess in stores often only speak French. Orange is offering mobile phone subscricptions with or without mobile phone in addition. You can also get a prepaid version, which comes without montly fees and let you control the cost (good match for children). Their phone subscriptions starts at around 6 € per month (SIM only) and go up to 40 €. Their biggest plan BeUnlimited comes with Unlimited Data in Luxembourg, Europe and US and is also offering unlimited calls and texts (be aware its not really unlimited but capped at around 6.000 Minutes a month). At their Webshop they also have an Online-Exclusive offer for 20 € a month that offers 50 GB mobile data and unlimited Calls in Europe + US. Apart from mobile phone plans, Orange is also offering TV options through their own TV app. This is especially interesting if you are interested in e.g. Sports as they offer couple of international sports like Premier League or Tennis. The TV option is nice if you already have an exitisting internet provider as you can book it without internet connected and just use an Apple TV or Chromecast to start watching. Last but not least Orange is also offer Internet subsciptions.