Can I install an alternate OS into my unlocked Sharp FX STX 2?

http://www.att.com/esupport/article.jsp?sid=KB111163&cv=821

Perform Master Reset for the Sharp FX STX 2 AT GoPhone Support

No.

Unlock usually means the phone is unlocked for different sim cards by different companies. For example, I have an ATTphone and I unlocked it for use on Tmobile network. Also, applies for taking your phone to another country to use their cellphone network providers.

Factory reset only changes the DATA of apps, user settings, phonecalls, messages, etc.
Unlock is not connected to that portion of control for factory reset.

Make sure you have your mobile data turned on. On some phone models, when sending an MMS, the phone will automatically enable it until it is sent. In order to receive one, you may have to enable your mobile data from the phone's menu. Since you're unlocked on T-Mobile, it's possible that your phone supports sending MMS over standard networks, but not receiving, in which case your phone's antenna is not compatible with T-Mobile's network frequency.

Hi visit Superunlockcodes.com to unlock your sharp st-x-2 mobile from network lock .Here they ask you the network name to which your mobile is locked and the IMEI number of your mobile .Then at last they deliver you code to unlock your mobile.

how can i fix my light on the touch screen on this phone

Hi,
You can unlock your Sharp FX stx2 mobile using unlocking codes from the site http://www.wickedunlock.com/ .They are cheap and reliable.I unlocked My mobile using this site.They gave me full support to unlock my ,mobile.So I suggest you to view this for more Details.

There can be many ways to Unlock your phone. As far as i know unlocking by codes is the simple and safe way. I will suggest the website Unlock-Zone.com which is doing good service and they were recommended highly in the cell phone forums.
I used them to unlock my cell phone. contacted them and within 30 mins i had my unlock code and my phone was unlocked.
Hope this helps.

I forgot my passWord for my sharp AT&T stx_2 can someone help me reste my phone

Get the subsidy code from Online site....

Well if you are tied to a particular network all you have to do is to unlock your phone to use it any other GSM network. You can get the unlock code through online. Give your IMEI number & get the unlock code for ur mobile .............You also get through online..........I will suggest the website Unlock-Zone.com which is doing good service .....you can approach this website.