I had a very strange experience with an agent. She indeed told me that the plan can be change at that very moment and I wanted to proceed. However she told me that she needs to make a credit check for that, which I found it weird as online in my account doesn't say anything about a credit check when changing plans. Anyway I agreed and she told me I didn't pass the check which was again weird as I have very good credit score with all 3 agencies. Then I went on my account online and changed the plan from there but will be in place from the start or new billing period. Now I want to cancel it because of all this bad experience.
Thanks for your post and apologies for the delayed response. If the plan you are changing to is related to the plan you are currently on and you are just increasing/decreasing your minutes or data then there should not any credit checks required. If this is for a completely different plan or one require a new handset then it will require a credit check.
I do see from your earlier post that you were able to get this updated yourself. Apologies you were not advised this as an option. Also that you are asking for your mobile service cancelled. Are you still wanting this done?
Because everything was so confusing and I am still upset about the credit check which will afect me, I have managed after about 2 hours of phone call being passfrom one to another person to cancel the upgrade. I will not cancel the service, I am just staying on the £7 tariff, however at least until Virgin is using EE because when switches to Vodafone I am out, the later having much worse coverage than the former and where I live has none.