The SIM-only plans are attractive, over £10 less per month (£21 for 500MB, versus £36 on a two-year agreement) versus the contract plans. Unfortunately, EE is citing an overrun in the testing process as the cause of the delay in offering the SIM-only rates. Such bumps in the road are not uncommon in the grand scheme. Earlier this week, EE acknowledged that there were groups of customers who were not experiencing a smooth transition from the T-Mobile or Orange services to EE. Some customers were without service for 24 hours or more, or others were waiting days for their new SIM cards or contact from EE to activate service.
EE expects to have SIM-only plans up for grabs within the next fortnight (that’s two weeks).
source: EE via ZDNet