Two things will affect your reception - antenna and spectrum. Smart phone vs. dumb phone doesn't matter.
Three companies consistently build phones with excellent antennas - Apple, Blackberry and Motorola.
Lower-end spectrum is better at penetrating obstacles, but doesn't travel as far. Higher-end spectrum travels further, but has problems penetrating obstacles.
The best solution for you will depend on who your carrier is and what phone you're using now.
.
forum.xda-developers.com
