Exhibits weak RNA 2',3'-cyclic phosphatase, catalyzing the hydrolysis of RNA molecules with a 2',3'-cyclic phosphate at the 3' end to produce RNA with a linear 3'-phosphate group (PubMed:32732418). Plays a role in the non-stop mRNA decay pathway (NSD), which specifically targets and degrades mRNAs that lack a proper stop codon (PubMed:40441874). {ECO:0000269|PubMed:32732418, ECO:0000269|PubMed:40441874}. This is the function of ENSG00000013523 (ANGEL1, angel homolog 1).