Be suspicious of anything requiring or asking for your Cell Phone Numbers. Texting anything will give the receiving entity your Wireless Cell Phone number just by texting them.
Downloading Phone Software is incredibly simple and is subject to abuse. Phone Software downloading is all done through texting and once you have made a request the sender has your Wireless Cellular Phone number and will charge you for anything through that number.
Before you download anything to your Wireless Cellular Phone or give out your Wireless Cellular Phone number READ the fine print of the terms and policies of what ever you are signing up for. You may be getting more than you initially asked for. When downloading anything that is free like ringtones be careful and read the policy terms very carefully. In many cases you will be automatically signed up for a monthly subscription that will charged to your Wireless Cellular Phone on a monthly basis for something you did not want that was in the fine print that you agreed to. Getting it to stop is fairly easy but you will need to realize that it is there and if you do not have an online account you will not find out about it until your monthly next bill.
You will have to pay at least one month charge To stop anything that is being charged to your phone will require you to use your text messaging feature that will cost you to send the 'STOP' notice. All you need to do is type in the word 'Stop' or Stop All'. It will then ask for a phone number at which time you then type in the 5 or 6 digit number that appears on you bill.
Even if you have not officially signed up for text messaging you will be paying for any received texting outsided of the free texting ads and communications you get from your provider. If you are not monitoring your Wireless Cellular Phone bill you could end up with text messages that are sent to you periodically and at any price per text message you unknowing agreed to. Most of these Free Phone Software companies are betting that you do not read the terms and Policies before you download you free software.
If you go online and sign up for something that requires your Wireless Cellular Phone number be very careful and understand why they want your Wireless Cellular Phone number in the first place. Some sites will start sending you text messages that will cost you what ever you agreed to for each text message and this will effect your monthly bill substantially before you realize what happened. Online surveys that are great for charging you through texting.
Anything Phone Software that is free is not really free especially a free Cell Phone Ringtone. They may be free for a period of time but will end up costing you a monthly charge or a periodic texting message that you will be charged for. So be sure you know what Phone software you are signing up for.