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\begin{abstract} In this manuscript, we answer a list of longstanding openproblems on weak phase retrieval including: (1) A complete classification ofthe vectors $\{x_i\}_{i=1}^2$ in $\RR^3$ that do weak phase retrieval; (2) Weshow that frames doing weak phase retrieval in $\RR^n$ must span $\RR^n$; (3)We give an example of a set of vectors doing phase retrieval but theirorthogonal complement hyperplanes fail weak phase retrieval; (4) We give aclassification of weak phase retrievable frames - which makes clear thedifference between phase retrieval and weak phase retrieval; (5) We classifywhen weak phase retrievable frames also do norm retrieval. We then introducethe notion of weak phase retrieval by projections and develop their basicproperties. We then look at phase (norm) retrieval by projections. We end withsome open problems.  We provide numerous examples to show that our results are best possible.\end{abstract}

A note on (weak) phase and norm retrievable Real Hilbert space frames and projections