Which Printer model can be used as a True A3/A4 Printing/Scan/Copy Wireless with ePrint

Question

I have been going around in circles to find a suitable printer which can do the following
1) Automactically detect A3 or A4 paper size and print accordingly scale automatically is required
2) Copy an A4 document and print the same on A3 Paper
3) Network connectivity - Wired and Wireless
4) Mobile Printing from iPhone, iPad, Android devices
Please consider this printer will be used to print mostly from a mobile device, and the print material will have to be printed on an A3 paper most of the time as the client for whom i would like to purchase the printer has reading difficulties with small text.
Appreciate some assistance, if anybody can help me out.
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Answer 1

The HP Officejet 7610 has most of the features you want - see the product description here.  It will scan up to 11.79" x 17" and will print and copy A3 and A4 size sheets.
Special features
Wi-FiWireless networking included
Individual InksReplace only the individual ink cartridge that runs out
HP ePrintThis product has HP ePrint features
Automatic document feederAllows multiple pages to be copied or scanned at one time
FaxFax capability
Wireless direct printPrint on the go with the wireless direct feature
Bob Headrick,  HP Expert
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