Help nexus 5 or iphone 5 or iphone 5c or S4?

Please help
I frequently use camera, mail and browsing

Don't go for iphone, you'll just be wasting your money for something you can't customize or anything. If you look at the previous iphones, you will notice that they are slowly becoming similar to android. I would go for a nexus 5.definitely worth the money. Hope this helped

You should go for S4.better camera, android, more apps, powerful processor

You you should not go for nokia 1020 as all v know it has 41mp camera
its better go fr iphone 5s than 5c
i gave a link which is compared with nexus 5 &s4
check it out n buy wat ever u wish & you can wait 1 more month bcoz new is coming so they will provide more offers & you can buy in cheap rates

Nexus 5
becuz, Camera + apps + browsing speed + best hardware: D

The Nexus 5 is a smartphone co-developed by Google and LG Electronics that runs the Android operating system. The successor to the Nexus 4, the device is the fifth smartphone in the Google Nexus series, a family of Android consumer devices marketed by Google and built by an original equipment manufacturer partner. The Nexus 5 was unveiled on October 31, 2013, and released for online purchase on Google Play the same day.
The Nexus 5's hardware is similar to that of the LG G2, with a Snapdragon 800 system-on-chip, and a 4.95-inch 1080p display. The Nexus 5 is also the first device to feature version 4.4 of Android. The components and labor required to construct the most basic iPhone 5 are estimated to cost US$207, which is US$19 more than the cost of components for the corresponding iPhone 4S model. The LTE module in the iPhone 5 alone costs $34, $10 more than the cellular module in the iPhone 4S. Similarly, screens used in the iPhone 5 cost $44, which is $7 more than the screen of its predecessor. Mashable noted that the profit margin of selling each device is "huge" as the iPhone 5 retails for US$649.
http://www.NewiPhone5.co.uk
After the announcement of the device, a lack of supply was evident. This was due to a shortage of components such as the screen. Reports emerged, stating that Sharp was unable to ship the screen before the debut of the iPhone 5, and other manufacturers reported that it was difficult to keep up with demand. As a result, the number of pre-orders rose due to the uncertainty of stock at retail stores, and the delivery dates for pre-orders were postponed to dates that were after the initial release date of the device.