Some phone companies will unlock phones under certain conditions, others are a bit less welcoming of this (after all, if you're locked to their network, the likelihood is that you'll stay their customer).
Ụfọdụ ụlọ ọrụ ekwentị ga-emeghe ekwentị na ụfọdụ ọnọdụ, ndị ọzọ bụ ihe na-adịghị anabata nke a (mgbe niile, ọ bụrụ na ị kpọchiri na netwọk ha, ọ ga-abụ na ị ga-abụ onye ahịa ha).