I am currenty studying in Hungary. I am on 48 and usually the network works fine here. Today I tried messing around with my APN settings to get the personal hotspot to work and now my mobile data has stopped working altogether. 

The setting I have entered in right now are:

mobile data:

APN 48months.liffeytelecom.com

MMS

APN 48months.liffeytelecom.com

MMSC http://mmc1/servlets/mms

MMS Proxy 10.1.11.19:8080

MMSmax message size 307200 (ive tried deleting this but it keeps reappearing) 

personal hotspot 

APN internet.proximus.be (have also tried deleting this but it keeps returning) 

Does anyone have any ideas on how to fix this please?