In general, changing your mortgage loan type after you have submitted your application can be possible, but it may come with certain considerations and implications. PHH Mortgage typically requires borrowers to formally request the change and may need to assess the new loan type against their established criteria. It is important to note that the change could affect your loan terms, interest rate, and possibly the timeline of your approval process. Additionally, the borrower's financial situation, creditworthiness, and other factors will likely be reevaluated under the new loan type. It is advisable for borrowers to closely review their current application and consult with a mortgage expert. For the most accurate and current information regarding such changes, it may be beneficial to refer to PHH Mortgage's official website or relevant documentation available there.