in dev. countries, the daily rates are about 400+ USD / day (Nigeria, Dubai, Iraq, Pakistan, …) (that’s alcatel networks, but i’m sure siemens and nokia have similar countries)
you need to contact your employer there and they will arrange for your working visa. Yes, you need to find a company that is willing to hire you in that country before proceeding for a working visa. They will take care of that for you though.
It might not be easy, but it worths trying !