Vodafone will also unlock its handsets, though at a potentially higher cost. You can generally get a free unlock if you're on contract-or if you purchased your phone more than 12 months ago. Otherwise it will cost around Â£20. Sometimes the network will unlock your phone in just one day, but it can take up to two weeks.EE is a little bit stricter with its unlocking terms.therwise it will cost around Â£20. Sometimes the network will unlock your phone in just one day, but it can take up to two weeks. EE is a little bit stricter with its unlocking terms.
1 Whitening Strips â These resemble clear adhesive bandages that are stuck onto the teeth and left there usually for 30 minutes at a time, twice a day for a week or two. 2  Brush-On Whitening â These gels are painted directly onto the teeth with a small brush and sometimes left overnight.
There are also food types that should be avoided after teeth whitening to prevent sensitivity and pain. The bleaching agents used in whitening treatments weaken tooth enamel in the short term. Oranges, lemons, limes, pickles, soft drinks, etc. can increase the acidity of your saliva which in turn can harm your teeth.nfortunately, coffee is one of the most common causes of tooth staining, and may even be the reason you need to get your teeth whitened in the first place. At the very least, dentists recommend waiting 48 hours after whitening before consuming dark foods or liquids. If you simply can't resist, use a straw.