Questions about IMEis and others network stuff

  1. So there is no way to send a custom IMEI to the provider? lol ... even if we know programming and have our own hardware? lol ... Also there is no way so i can keep in memory 20-50 SIM cards data and randomly use any of them , at any give them?

  2. What others data is sent to the cell ? Cell phone type, version , year? Does it send the brandname ARDUINO GSM shield or what? You know like user agents are sending things like Browser, WINDOWS version, etc ?