Ghaziabad power backup claims are mostly false advertising

Is full flat power backup in Ghaziabad just a marketing gimmick? I'm so fed up of renting, finally took the plunge and booked a flat in Jain Homes 02. Builder ne bola tha full backup milega. Par ab sunn raha hoon ki sirf common areas aur ek light point ke liye hi hota hai. Matlab inverter lagana hi padega ya yeh societies mein bhi backup ka scene kharab rehta hai? Honestly not sure what to expect. Aur water supply ka kya haal hai? Kabhi tanker mangwana padta hai kya ya society ka paani reliable hota hai? Any Jain Homes 02 residents can share their experience?