Mobile provider program language
I am interested in the followings:
- Which kind of program languages do the mobile providers (e.g. T-mobile, Telenor, Vodafon etc.) use for their services?
- Apart from the platform the device uses, is there any chance to write services and programme for providers?
For instance, to have my idea realized, I need an app for the phones and another for the system because I need more data from the providers.
I tried looking for something about it on the web and I found this forum. I hope someone could help. Thanks in advance.