Wireless network says validating identity
Every IMSI number consists of a MCC (Mobile Country Code) and MNC (Mobile Network Code).
Example IMSI number: 356789The above IMSI indicate the SIM is from Canada (302) Rogers Wireless (720).
As soon as i Phone Dev-Team failed to produce Ultrasn0w unlock for i Phone 4 2.10.04, 3.10.01 baseband, a Chinese hacker team called Gevey started to look into the issue and found a working solution which can actually unlock i Phone 4 on said the basebands.
Before i may go into pros and cons of Gevey's i Phone 4 unlock, i would like to clarify what is Gevey SIM hack and how it works to unlock your i Phone 4?
One of them is slow convergence, which is a serious limiting factor for many modern applications.In order to stay unlocked, you ALWAYS need to keep that SIM interposer in-between your SIM card and i Phone baseband hardware.While your i Phone is unlocked with Gevey's SIM interposer, if it loses power due to low battery or loses reception due to poor signal coverage, you have to perform the whole unlock procedure again.While this may be a serious problem at a large scale, we are not going to discuss these pathological cases, but rather talk about convergence in general.
Like any distance-vector protocol, BGP routing process accepts multiple incoming routing updates, and advertises only the best routes to its peers.
In absence of any policies, BGP operates like if routes have metric equal to the length of the AS_PATH attribute.