I’m using Vodafone 4G from since 2015.
I never got any problems. But sometimes I got no network in village and and also it turn into 3G and 2G automatically when signal is weak. But with the advantage Vodafone 4G make you very happy with their speed , sometimes I turn off WiFi and start using 4G , I prefer this internet.
When you have to download big space files I prefer to use Vodafone net with the speed of 2Mbps.
I’m still using Vodafone 4G , I’m really a big fan of it.
I refer to you to buy Vodafone 4G sim and you have to use it.