In Nigeria, unsaid rites of passage is finding a network provider that understands your location the most. From MTN to Airtel, 9Mobile to GLO, the choices are never about loyalty it's more about the network that can get us connected without street or tears.
For me, my phone can take up to two SIMs, so I use both MTN and Airtel, nit because I want to buy because I've been betrayed , many times. So yes, if my phone could take up to 3 or 4 Sims I would include GLO and even 9mobile.