CarrierEditor for Mac lets users with iOS devices change the icon that's displayed for their wireless carrier. The app is easy to use, but unfortunately, it didn't work for us.
We're not ones to really fiddle around much with our iPhone 5's display, so we were a little nervous about trying CarrierEditor for Mac. It ended up being incredibly easy to use, with a wizard-style interface that walked us through each step of the process. We were first instructed to select a new icon to use in place of our phone's existing carrier logo. A quick Google search turned up a suitable-looking skull icon that we thought would be fun to try. We just dragged and dropped the new icon onto CarrierEditor's interface and it created a new IPCC file. We then followed the app's instructions to hold the "Alt" key while clicking the "Restore iPhone" button in iTunes. As promised, we were able to select the new IPCC file, and it appeared to be updating our phone. But then...nothing. We restarted our phone, as CarrierEditor had suggested this might be necessary, but our usual logo was still there. We tried the process several more times, synching and restarting in between, and nothing happened. CarrierEditor doesn't include a Help file, so there was no way to troubleshoot. Although we weren't particularly excited about changing our carrier icon to begin with -- the default logo suits us just fine -- we do think it's a shame that an app that's so well designed and easy to use doesn't actually perform its stated function.
CarrierEditor for Mac installs and uninstalls without issues. It might be worth a try if you really want to change your device's wireless carrier icon, but be prepared for the possibility that it might not work.
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CarrierEditor allows you to customize your iOS device's carrier logo to something totally different. This is limited to devices that can support data/phone service, so no WiFi-only devices. Some carriers might not be supported because they do not use images for their logos (e.g. Sprint). The good part is that CarrierEditor works WITHOUT a jailbreak on any firmware, so iPhone 5's and iPad LTE's work. If you do not see your device/carrier within CarrierEditor in the drop down lists, it means that your device is incompatible.