Formal:
* మీరు ఎప్పుడు వస్తారు? (mee-ru eppudu vastaaru?) - This is the most formal and polite way to ask.
* ఎప్పుడు వచ్చేస్తున్నారు? (eppudu vachchesthunnaaru?) - This is also formal and polite.
Informal:
* ఎప్పుడు వస్తావు? (eppudu vastaavu?) - This is a more casual way to ask, used with friends or family.
* ఎప్పుడు వచ్చేస్తున్నావు? (eppudu vachchesthunnaavu?) - This is also informal and can be used with friends or family.
Other options:
* ఎప్పుటికి వస్తారు? (epputiki vastaaru?) - This means "When will you come?" and is more specific about a time period.
* ఎప్పుడు వచ్చే అవకాశం ఉంది? (eppudu vachche avakaasam undi?) - This means "When is there a chance you will come?" and implies that you are not sure when they might come.
The best way to translate the phrase depends on the specific situation and your relationship with the person you are speaking to.