Phosphatase that acts on lipids with a phosphoinositol headgroup. Has phosphatase activity towards phosphatidylinositol 3- phosphate and phosphatidylinositol 3,5-bisphosphate (By similarity). Binds phosphatidylinositol 4-phosphate, phosphatidylinositol 5- phosphate, phosphatidylinositol 3,5-bisphosphate and phosphatidylinositol 3,4,5-trisphosphate. Stabilizes SBF2/MTMR13 at the membranes. Specifically in peripheral nerves, stabilizes SBF2/MTMR13 protein (By similarity). {By
SimilarityUniProtKB:Q13614, By
SimilarityUniProtKB:Q9Z2D1}.