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This work presents Reliable Download analyses with and without interleaving in MBMS (Multimedia Broadcast Multicast Services) under various network conditions specific to MBMS. Since MBMS download mechanism uses unidirectional multicast from one sender to a group of receivers, an application layer FEC (Forward Error Correction) is used to recover from packet losses. Our work considers Reed Solomon and Raptor FEC coding. We have done experimental work to discover Reed Solomon FEC performance under MBMS link conditions while we used analytical model for Raptor FEC under the same environment. Finally, in order to further increase the FEC performance we have applied an application layer interleaving technique to our MBMS download system that also supports progressive download and provided a performance comparison of the legacy and the interleaved download delivery.