Many Foreign students from different part of the World like Saudi Arab, Malaysia, Indonesia, Turkey, China, Somalia, Afghans are visiting Pakistan as exchange Students or for whole bachelors or master degrees.
Besides you can see many Chinese, Japanese, Europeans, Turkeys, Arabs, America, Malaysians, Africans visit Pakistan to open a new Business or to settle down in Pakistan.
Like in any foreign country, if you are a foreigner and are planning to residence in Pakistan than you could face challenges while finding a proper Residence in Pakistan. Not all the cities are Foreign friendly in Pakistan. You can live in Karachi, Lahore or in Islamabad without facing any social problems.