  We report magnetotransport study on type-II Weyl semimetal WP$_2$ single
crystals. Magnetoresistance (MR) exhibits a nonsaturating $H^{n}$ field
dependence (14,300\% at 2 K and 9 T) whereas systematic violation of Kohler's
rule was observed. Quantum oscillations reveal a complex multiband electronic
structure. The cyclotron effective mass close to the mass of free electron
m$_e$ was observed in quantum oscillations along $b$-axis, while reduced
effective mass of about 0.5$m_e$ was observed in $a$-axis quantum oscillations,
suggesting Fermi surface anisotropy. Temperature dependence of the resistivity
shows a large upturn that cannot be explained by the multi-band
magnetoresistance of conventional metals. Even though crystal structure of
WP$_{2}$ is not layered as in transition metal dichalcogenides, quantum
oscillations suggest partial two-dimensional character.
