Surprisingly for most people, the phone number (called MSISDN in terms of mobile networks) is not stored on SIM card, which contain only SIM ID, called IMSI (International Mobile Subscriber Identity). By consequence, there is nothing that can be changed locally in a secure way, on SIM level. This is why XCell Stealth Phones can change/manipulate IMSI and cannot directly change phone number.

Hiding Caller ID is something else than changing phone number and depends on your cell phone and mobile network settings. The result is just a Unknown call received by the call recipient. Read more here.

Before everything, let’s face it: who do you really fear?
There are not so many hackers around that can actually track your cell phone, because of few simple reasons: expensive hardware needed, lack of knowledge regarding GSM stack and SS7 protocol effective exploits, not to mention that hackers have no interests on you, average Joe. Excepting your worried parents and jealous girlfriend, no one wants to know your (cell phone) geo-location. Tracking a cell phone is not a simple “push button” situation when is done by a hacker. That involve deep and extensive knowledge, pretty expensive hardware, time and not least, an considerable interest on you, average Joe. Which obviously is not the case unless you are just another skilled hacker or a high profile person.
The situation became serious when you did something bad or even illegal. Then, you became a target for law enforcement and/or intelligence agencies. And there is no way to hide your (cell phone) location. They have not only the legal ability to track down your cell phone at any time, but have also technological and human resources to do that, not to mention training and expertise.
In case you think that your own cell phone is secure, its time for 2 simple tests.

TEST No. 1: NETWORK TESTING BY EMERGENCY CALL.

Read more here.

To be honest with you and also with XCell guys, their old website doesn't look too nice. In fact the look was pretty obsolete with that old HTML version. But now everything is changed and you can navigate on a brand new web shop: https://stealth-phones.com
However, not the website look is important but the new products you can buy there, now without any sale restrictions as they had before on the old site (x-cellular.com).
There is also a page that we appreciate more than others: The Blog. After getting permission, we will start posting some interesting articles from their blog.