After deactivating my phone, can i reactivate it later?
Hopefully this is what you were looking for. Reactivating My Republic Phone
some what depends on the phone
Legacy phones there is no issue reactivating at a later date
3.0 phones when deactivate the SIMs cards are killed and need to be replaced (a CDMA[Sprint] 3.0 phone will become a GSM [T-Mobile] BYOD phone)
We are no longer able to activate the DEFY XT.
Any phones on this list require a new SIM card to be re-activated, and as, @drm186 mentioned, we are not able to provide SIM cards to support our Sprint coverage. They would have to be activated with our GSM SIM card.
The Moto E (1st and 2nd Gen), Moto G (1st and 3rd Gen) and Moto X(1st and 2nd Gen) can be re-activated as needed.