I think it is amazing how you created this without even owning the model. For the confused in this thread, the SM-G530T is the T-Mobile and only the T-Mobile model. Be sure to flash accordingly as the Grand Prime has several slightly different(mostly software but some hardware too) variants. Can I make a request of the developer that I think should be very easy to do(if I am wrong, correct me)? Could you please package it so it can be installed via custom recovery(if there is one, haven't checked yet), ADB, or fastboot? Heimdall seems to not work on this model which I am trying to help debug for Heimdall's developer(not an expert in this field, but I have offered to give him all the logs and tests he needs) since a few newer Samsungs all suffer the same failure reported by many users. Not everyone runs Windows, so if you could do this, I am sure many Linux/Mac/UNiX/perhaps others users would be very grateful.