Tenerife r any off the islands there speed are halfed ... you need to get a VF dongle then you on there system ... you still on Telefonica system via a telphone line as VF can rent line of TF , speeds on the islands are very bad , unless you used dongle r cable tv system , all phone and internet supplier have T&C ,term and condition please read the very small print .
Vodafone Mobile Broadband Performance Plus Terms and Conditions (from June 13 2011) yes that have change again there T&C
you can have speed up to what is the traife you bought , need to Customer Right of Cancellation and need to report to Communications Regulation in Madrid aswell
your are not only people with DSL problems , we all have it , please ask around . i fine at work where we have net coming out cables , wifi , Cable tv , fiber optic , Satelitte Broadband we have the powr to tell the phone and supplier what we need , but at home .... ya right have have moved supplier few time but as i rent i moved and now have a link , eye to work mast tower , but moving around i used a VF dongle on passport package , and fine it two be the best for me
Canary Islands DSL is SJITE .....