Cobertura de iphone caducada

Do you mean, you updated your iPhone and the SIM all of a sudden became locked to T-Mobile?  If so.  Wherever you got it from used a hack that was patched in the update that circumvented the SIM lock on the device.  For a device to be eligible for a SIM unlock from T-Mobile.  You must be a T-Mobile USA customer and your account and device must meet all of the SIM Unlock Policy requirements.  

Política de desbloqueo de SIM | Desbloquea tu dispositivo móvil | T-Mobile