We report preliminary results obtained in a magneto-transport study in the normal state of overdoped ( T c∼63 K) and underdoped ( T c∼60 K and T c∼30 K) Bi 2Sr 2CaCu 2O 8+δ thin films. In all cases the transverse magnetoresistance ( H‖ c with in-plane current) is positive and proportional to H 2 up to 20 T for temperatures above approximately 110 K and does not follow Kohler's rule. No proportionality between the magnetoresistance and the square of the Hall angle θ H is observed, as would be expected if both quantities were governed by the same relaxation time τ H. In the high-temperature range the magnetoresistance of the underdoped samples appears to saturate in the vicinity of the temperature T ∗ where the resistivity shows a downturn from T-linear dependence.