Simple way to toggle between 2G and 3G connection

## TL;DR Usually, I have my device locked to "2G only" for multiple reasons: * saving [tag:battery-life] * no need for "high-speed" to simply be informed about new mail or doing the little contacts/calendar syncs (not much changes, either) But from time to time, I could use 3G: * some area that has bad 2G coverage (data-wise) * the occasional "internet use" e.g. with a navigation app, looking up "a little more" on the web, or installing something from [tag:google-play-store] For those occasions, I find it impractical to navigate to the settings page and change that manually -- even when done via some "shortcut" placed on a [tag:homescreen]. Preferably, I want to be able to automate this via [tag:tasker], to e.g. automatically switch when entering/leaving the "bad coverage area" or when one of those apps is in foreground (both conditions are covered by tasker, just the "action" is missing). I checked thoroughly on our site here, on the [tag:google-play-store], and even did an extensive Google search -- but all that turned up was either a shortcut or a kernel patch for specific ROMs, both no-gos for me. Hence my... ## Question: Is there any easy way to switch between 2G/3G mode? As said, shortcuts to the settings page do not count (so [Can anyone reccomend a 2g / 3g switching widget?](https://android.stackexchange.com/q/2445/16575) is no option). Wanted criteria include: * not requiring more than one tap (preferably no tap to trigger the action, see below) * a big plus (and favorite wish): ability to be triggered via [tag:tasker] * not depending on specific ROMs (should work with [tag:stock-rom]) * preferably not involving [tag:root] -- but options requiring root would still be fine with me * [tag:command-line] hacks are fine with me as well :)