I'm copy paste this tutorial from forum.xda-developers.com :The Micromax Bolt A62 owners may also want to keep their device up-to-date. So we thought of giving you a tutorial of how to upgrade Micromax Bolt A62 to Android 4.0.4 ICS/Ice Cream Sandwich. With new version of android operating system on your device, you will have more benefit. Your device will have more feature, more secure, more fast performance, and more cool he...3x. But prior to telling you how to install Android 4.0.4 ICS/Ice Cream Sandwich on Micromax Bolt A62, let’s see what do you want in order to be able to perform the installation. You will have to download 4.0.4 ICS/Ice Cream Sandwich Micromax Bolt A62 ROM. You will also have to root your Micromax Bolt A62 to prepare it for Android 4.0.4 ICS/Ice Cream Sandwich upgrade. Discover how to root Micromax Bolt A62 and install Android 4.0.4 ICS/Ice Cream Sandwich from here. Here are the download links of the files you want to update Micromax Bolt A62 to Android 4.0.4 ICS/Ice Cream Sandwich. Just before beginning to upgrade your Micromax Bolt A62 to Android 4.0.4 ICS/Ice Cream Sandwich don’t forget to backup your information, as contacts, text messages and the apps installed from Google Play Store who maybe lost when the installation finishes. Now let’s see how to update Micromax Bolt A62 to Android 4.0.4 ICS/Ice Cream Sandwich :
1. Install the ROM Manager on your Micromax Bolt A62. Get it from Google Play Store, then install the clockwork mod recovery.
2. Connect your Micromax Bolt A62 to your PC employing the USB information cable. Copy the “Micromax Bolt A62_4.0.4 ICS/Ice Cream Sandwich.zip” file you downloaded to the SD memory card.
3. Restart your device in the recovery mode using ROM Manager. As soon as in Recovery Mode, go to ROM Manager and select backup / restore to back-up your information.
4. From the Recovery Menu do a total data erase (including Delvik Cache). When completed, go back to Recovery Principal Menu and choose Flash ROM from SD Card. Navigate the location you copied the ”Micromax Bolt A62_4.0.4 ICS/Ice Cream Sandwich.zip” file and follow the directions for installing Android 4.0.4 ICS/Ice Cream Sandwich on your Micromax Bolt A62. As soon as the installation is over, just reboot your Micromax Bolt A62 device, and here you go, you’ve just upgraded it to the new Android 4.0.4 ICS/Ice Cream Sandwich.
Note: Here Is Link To Download the ROM =
The ROM File size is 128 MB, so I split the file into 3 parts :
ROM Part 1 : http://adf.ly/ZIWPr
ROM Part 2 : http://adf.ly/ZIWVr
ROM Part 3 : http://adf.ly/ZIWfI
To combine 3 parts files above into 1 file just use WINRAR, then extract the files into ZIP format.
If any problem with the ROM, maybe because the ROM have corrupted during the download process, you can try to re-download the ROM.
Thank you for visiting Upgrade/Update Micromax Bolt A62 to 4.0.4 ICS/Ice Cream Sandwich
Tutorial Video : Easy Way To Download at downloadsafe.org/sharecash.org =