Odido

New name is retarded, new border crossing messages are worse than before, horrible app and English isn't fully supported... and they also increased the price of the service. Time to switch to a different provider. Update: They now also started complaining about my internet usage, while that hasn't changed in 7 years. Had enough and switched providers.

Bad company, don't expect to get helped if you have a problem. I renewed my subscription through the app, it showed me the new bundle that I selected unlimited calling for and then 2 weeks later the app tells me that I have 40€ extra cost because of calling. When I call the customer service them they don't want to help me with it becasue in their system I still have the old subscription. It is very incorrect to invoice 40€ for something that with a flick of a switch they would give for 3€.

Very unstable app that often doesn't do the one thing it should always do: allow customers to top up their allocated data. Prepare for hours on 32K/s or less, 'something' went wrong and you should try again later... One of the best 'non-descript system messages' sources I know. t-Mobile / Odido used to offer robust interfaces, both with their apps and on the websites. Those days are long gone, glitchy code appears to be good enough nowadays. I got myself a Lebara sim as a fallback option.