The best replacement for 4.0 is 4.1.

The best alternatives to 4.0 are rated as following:
★★★★★  4.1
★★★★  4.2
★★★★  4.6
★★★  4.6 range rover
★★★  4.7 grand cherokee
★★★  3.8
★★★  4.3
★★  4.7
★★  4.7 jeep
★★  3.8 jeep
★★  5.2
★★  3.0 ranger
★★  4.7 wj
★  freetime
★  3.7
★  elemental
★  3.0 ford ranger
★  3.5
★  5.0
★  3.7 jeep
★  5.0 gpa
★  4.6 explorer
★  ios 5
★  ford 4.0
★  3.6 jeep
★  ice cream sandwich
★  2.3
★  2.5 jeep
  4.5
  windows 2000
  3.0
  4.0 ho
  4.2 android
  3.6 pentastar
  android 2.3
  flip
  fuzzibunz
  4.3 android
  4.01
  3.1.3
  4.0 high output
  3.9 gpa
  2.1
  3.6
  xhtml
  android 4.1
  2.8

Your alternative for 4.0 is not listed? Suggest!
Speaking about 4.0, one probably shouldn't forget about touchwiz.

Other search terms related to 4.0 and their ratings are:
★★★★★ touchwiz
★ 3.5
You have in mind a companion for 4.0 and it is not yet here? Propose!



Google Trends

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4.0
4.1
4.2