The basis of open-ended typographic collaboration is that we can modify a typeface, and potentially share these modifications with the original author. For that, it is important that we start from the right kind of font file. The analogy with an image: when working on a Photoshop file (or a Gimp file!) one looses the information contained in the layers when exporting it as a PNG file. When saving as a JPEG file, the visual quality even degrades.
It works perfectly well for voice, text and internet. It is only the MMS setting that I suppose must have been modified when leclerc became reglo (that is how long I have had the sim card). MMS is of no interest in any case because I use whatsapp for sending images, and I never take the sim out, if I to use mobile data for another device I simply use the phone ,as a hotspot. So one way and another it does not seem worth the trouble of getting a new sim card.