Don't read if you are looking for Indian warranty on Nexus 5. If you need warranty in India, You need to use India play store, Indian Online shopping sites or showroom near you. Nexus is not providing international warranty. By following this method, you will get only USA warranty for your Nexus 5.
What do you need?
1. USA IP Address
2. International or USA Credit Card
3. USA Shipping Address
If you don't have an international credit card, I would suggest you to drop your idea of buying Nexus 5 from USA. If you don't know anything about your credit card, just use it in google play store, If you are lucky, your card will be accepted in google play store. (You can still get an usa credit card. The details are in the end)
Warning : Once you made a successful transaction on play store, you can't use your gmail address to access Google India Play Store. You will be taken to the USA play store.
There are so many proxy websites available to change your IP Address. But most of them will not work with secured connection. So I suggest you to download TunnelBear. TunnelBear provides 500MB of data every month to browse the world with USA, Europe and few more countries' IP address.
Now, You got an USA ip address. I assume you already have one international credit card. Now we need USA shipping address. Many websites are providing free USA shipping address.
These are the steps involved to buy Nexus 5 from USA
1. Buy Nexus 5 from USA using USA IP Address, International credit card and USA shipping address
2. Google will ship your device to your temporary USA Shipping Address
3. That temporary shipping address will collect your device and send it back to India (to your address)
How to get USA Shipping Address?
USA Shipping Address is nothing but a service provider's company address. Go to ComGateway and register for an account. You will almost understand how does it work. You will enter your contact details and Indian address in ComGateway. In the return, they will provide one USA Shipping Address for you. That is going to be your USA shipping address in Google Play Store. (Many websites are providing USA Shipping address. Search for google and find the right one.)
Your ComGate address will look like this.
17146 NE Sandy Blvd
c/o xxx-yyyy
Portland, OREGON 97230
Tel: 503-914-6317
That c/o xxx-yyyy is important. That is unique for every users. They will find your Indian address using that c/o xxx-yyyy only.
* Go to google play store
* Enter the complete address including c/o xxx-yyyy
* Choose the product - color, size and everything.
Google will charge about $10 for shipping and tax will be free for OREGON.
If you go for 32GB version, you need to pay $408.99 which is approximately Rs.25,500/-
Your product will be shipped to ComGateway in few days. Once they receive the product, they will send a mail to you. Now, it is time to pay some money to ComGateway to ship the nexus 5 to India.
Go to ComGateway website and see the package details. They charge for KG. I can't tell you how much they will charge for your nexus 5. The phone will be generally charged for 1KG and if you search online, you will find some coupon code to get complete or some discount for your first shipping.
Phone's cost is increased now :
Google Play : Rs. 25,500
ComGatewat Shipping Cost: Rs.2000 (I have put the maximum. You can get discounts by using coupon codes.)
The Phone's Cost is now : Rs.27,500
There is a final check point on your device. That is Indian Customs. The product will be verified in Indian customs and you will be asked to pay 7% for mobiles. Just go through the Indian Customs Tarrif. 7% will be Rs.1785 for Rs.25,500. Let me round it to Rs.2000.
The final cost will be
Play Store Price : Rs.25,500
ComGateway Shipping: Rs.2000
Indian Customs Charge: Rs.2000
Total : Rs29,500.
The actual cost for this 32GB in India's play store is Rs.32,999 and you can buy it for Rs.29,500. You can save approximately Rs.3500 or even more. It is going to be a big process and it will take a lot of time to get the product in your hand. Importantly, It will come to your hand without any warranty (with usa warranty).
So think and buy.
Additional Info : How to get USA Credit Card
There are so many online websites who are providing USA virtual credit card. You need to register on their site. You should pay the required money from your credit card to their website. If the transaction is success, they will provide a virtual credit card which can be used to buy the nexus 5. It is not free again. You might lose another Rs.2000 or so for this transaction. I haven't used this since I have an international credit card! Usunlocked and more virtual card providers are there.
Good Luck!