I have tried to install the .NET Compact Framework 2.0 on my T-Mobile SDA (UK), which runs Windows Mobile 2003 Second Edition.
I receive a message saying that the program is not compatible with the operating system and may not run on the device. I have tried to continue installing but get a message saying 'unable to install' whether I try to install to phone or storage card.
Any ideas

.NET Compact Framework 2.0 installation on T-Mobile SDA (UK)
white2grey
Dual Cortex
See this.
MLG_CSE
Is that SmartPhone device (without touch screen) running Windows Mobile 2003 SE for SmartPhone If so it’s not supported by NETCF V2 at all.
If not, I’ve seen at least one 2003 SE PPC with the same issue, it probably was unverified leaked OS image.