A method for updating a location of a User Equipment, UE , when said UE moves from a first type of telecommunication network to a second type of telecommunication network different from said first type of telecommunication network, wherein said method comprises the steps of: - receiving , by a user subscription node comprised by said second type of telecommunication network, an indication that said UE has requested registration to said second type of telecommunication network; - determining, by said user subscription node comprised by said second type of telecommunication network, that said UE is registered in said first type of telecommunication network; - transmitting , by said user subscription node comprised by said second type of telecommunication network, a location removal message to a user subscription node comprised by said first type of telecommunication network for removing location information relating to said UE by said user subscription node comprised by said first type of telecommunication network, wherein any of: - said first type of telecommunication network is a 5G telecommunication network, said second type of telecommunication network is a 4G telecommunication network, said user subscription node comprised by said first type of telecommunication network is a User Data Management node , and said user subscription node comprised by said second type of telecommunication network is a Home Subscriber Server node; - said first type of telecommunication network is a 4G telecommunication network, said second type of telecommunication network is a 5G telecommunication network, said user subscription node comprised by said first type of telecommunication network is a Home Subscriber Server node , and said user subscription node comprised by said second type of telecommunication network is a User Data Management node. - receiving , by a user subscription node comprised by said second type of telecommunication network, an indication that said UE has requested registration to said second type of telecommunication network; - determining, by said user subscription node comprised by said second type of telecommunication network, that said UE is registered in said first type of telecommunication network; - transmitting , by said user subscription node comprised by said second type of telecommunication network, a location removal message to a user subscription node comprised by said first type of telecommunication network for removing location information relating to said UE by said user subscription node comprised by said first type of telecommunication network, - said first type of telecommunication network is a 5G telecommunication network, said second type of telecommunication network is a 4G telecommunication network, said user subscription node comprised by said first type of telecommunication network is a User Data Management node , and said user subscription node comprised by said second type of telecommunication network is a Home Subscriber Server node; - said first type of telecommunication network is a 4G telecommunication network, said second type of telecommunication network is a 5G telecommunication network, said user subscription node comprised by said first type of telecommunication network is a Home Subscriber Server node , and said user subscription node comprised by said second type of telecommunication network is a User Data Management node. <EOS>