Yes, you can use any of the ink cartridges listed on this page in the HP Deskjet 3050A e-All-in-One printer including the genuine or compatible HP 301XL high capacity black ink cartridges.

Unfortunately, because your HP Deskjet 3050A printer was puchased outside of the UK, it won't accept the HP 301 cartridges which will only work if your Deskjet 3050A e-All-in-One printer was purchased in the UK. It might be possible for HP to change the region code on your printer so that it can accept the UK cartridge numbers (HP 301 / 301XL) that we supply. However, only HP are able to offer this service so you'd need to contact them directly for further assistance on this matter.
Please find attached a link to the HP contacts page: http://www8.hp.com/uk/en/contact-hp/contact.html

Yes, we sell single packs of the Deskjet 3050A tri-colour ink cartridges as well as the multipacks which have both black and colour ink. You can use either the HP 301 tri-colour ink cartridge or the HP 301XL high capacity tri-colour ink cartridge in the HP Deskjet 3050A e-All-in-One printer. Both of these cartridges are available as genuine HP products or we have a compatible HP 301XL tri-colour cartridge which is made by a third-party manufacturer as a cheaper alternative. Please see the links below for the single colour cartridges that work in the Deskjet 3050A printer:

Genuine HP 301 tri-colour ink cartridge (CH562EE): http://www.cartridgesave.co.uk/CH562EE.html

Genuine HP 301XL high capacity tri-colour ink cartridge (CH564EE): http://www.cartridgesave.co.uk/CH564EE.html

Compatible HP 301XL high capacity tri-colour ink cartridge (replaces CH564EE): http://www.cartridgesave.co.uk/CH564EE-RET.html

Yes, our compatible HP Deskjet 3050A e-All-in-One ink cartridges are listed above under "Premium brand" cartridges and cost less than the original HP cartridges. All current prices are shown beside each item on the right-hand side of the page in red / grey font.

Your HP Deskjet 3050A e-All-in-One printer manual should have instructions on how to replace the ink cartridges. If not, please contact HP directly to ask for technical support. The best ink to buy for your Deskjet 3050A depends on the nature of your printing. For example, if you want the best print quality and reliability you can't go far wrong ordering the genuine HP Deskjet 3050A ink cartridges. They're available in HP 301 standard capacity cartridges and HP 301XL high capacity cartridges for black and colour. High capacity 301XL cartridges contain more ink and produce a lower cost-per-print so if you use up a lot of ink they are the best choice. If you want the cheapest cartridges and aren't concerned with buying HP branded ink you should consider our high quality compatible HP Deskjet 3050A ink cartridges which are sold at a lower price and work equally well within the printer.

No, the HP Deskjet 3050A e-All-in-One uses HP 301 / 301XL cartridges as indicated on this page.

The HP 121 cartridge is not valid for use in the UK version of the HP Deskjet 3050A e-All-in-One printer. This would indicate that your printer was not purchased in the UK. If this is the case, none of the ink cartridges we supply will be compatible as we only supply cartridges for use in UK printer models. Please contact HP directly as they might be able to advise you how to proceed.

Unfortunately, we're unable to source compatible HP Deskjet 3050A e-All-in-One printer cartridges at this time. As soon as they become available we'll update the website accordingly.