About build 237
First, I goofed in reading your screenshot - your download is not ending 27, but 237. And that's the build number, not the version (I am not a developer, and I am tired.) Per an article in Forbes, your build number ending in 237 of version 9.3 was put out by Apple to fix a bricking issue (not the inert Safari/email issue we are discussing here). The link here explains, but that doesn't clear up the basic how-to-read-the-version question:
At this article in Forbes, dated 29 March (quoting at length because people seem not to follow links (or can't ;-) ):
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"Last week, it was revealed that an Apple AAPL +2.11% iOS 9.3 glitch was causing older iPhones and iPads to become bricked. That is why Apple released an updated build of iOS 9.3 for users that were affected by the “activation bug.” The new version is still called iOS 9.3, but it has an updated build number called 13E5237. The “activation bug” essentially prevented older iPhones and iPads from upgrading to iOS 9.3.
Prior to releasing the new version of iOS 9.3, Applepublished a support page and confirmed the activation bug in a statement to iMore on March 24th:
“Updating some iOS devices (iPhone 5s and earlier and iPad Air and earlier) to iOS 9.3 can require entering the Apple ID and password used to set up the device in order to complete the software update. In some cases, if customers do not recall their password, their device will remain in an inactivated state until they can recover or reset their password. For these older devices, we have temporarily pulled back the update and will release an updated version of iOS 9.3 in the next few days that does not require this step.”
Once the problem was discovered, Apple temporarily stopped issuing iOS 9.3 to older devices. If your older Apple device was bricked by iOS 9.3, then you may be able to restore it using the Device Firmware Update (DFU) mode and opening iTunes while your device is plugged into your computer. DFU mode ensures that your iOS device can still communicate with iTunes without actually activating the boot loader or iOS. Here is a tutorial video that explains how to set your device to DFU mode:
[and there's a video on how to do it...and I think I recall one post here than mentioned using DFU.]
Older iPhones and iPads that were not bricked can access the updated version of iOS 9.3 by going to Settings and Software Update."
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I haven't definitively answered the basic question about version numbering, but the info in Forbes about a 24 March update and the Wikipedia info below implies that your 237 build is more recent.
Here is Wikipedia's summary (condensed - the feature lists make the original table miles long) from
FWIW:
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