Iran street maps are available on Ovi Store and more precisely through Ovi Maps application which you install onto your phone. Viewing maps outside Ovi Maps is not possible and there is no better support for maps and street view than this application which has been developed for Symbian operating system. Getting Ovi Maps is easy because you can download Nokia PC Suite which has Ovi Store incorporated. You do not need to worry about connectivity issues because the package has all the drivers needed. Download Nokia PC Suite from the link I provided and perform an installation by following setup's instructions when prompted then connect your phone and wait for the device to be recognized and installed. At this point, you will have the connection established between Ovi Store and your phone through Nokia PC Suite.
Start Nokia PC Suite and launch Ovi Store and search for either Ovi Maps or Nokia Maps and install it to your phone by clicking
Install from its page. Then you can browse maps (including Iran) from all over the phone. There is an option for off-line viewing where the maps are downloaded for later use when you do not have an Internet connection.