NOT FOR PRE-PAY OR PAY-AS-YOU-GO DEVICES. ONCE DOWNLOADED: This app, will not be able to be removed easily nor will you be able to disable completely. Normally not an issue as this does not take up a whole lot of space nor does it use a lot of data. But for those with devices that do NOT come with a lot of storage, ram, or not on a data plan; will find this to be an issue down the line. Great app for all T-Mo phones from T-Mobile. Pay-as-u-go T-Mo, as I'm told, is not of the same company.