3220_V1 is a old hardware version which has been sold for several years, so normally it won't have such problem. Therefore, please try to reset your 3220 and then try to upgrade the firmware first;...

maybe you can follow the FAQ below to have a try first: www.tp-link.com/en/article/?faqid=269 www.tp-link.com/en/article/?faqid=400

There are some new firmware newer than what you use on your TL-MR3420_V2(121206), why don't give a try first: www.tp-link.com/en/support/download/?model=TL-MR3420&version=V2#tbl_j

I think tp-link has claimed some useful information for us in this post: http://forum.tp-link.com/showthread.php?78007-Declaration-of-3G-4G-compatibility-issues&region=china we need to confirm our...

ahmed2014 wrote thank you yes I known M5350 but the wifi range not good and not support Lan port ! Well, you'r right. M5350 doesn't get a LAN port.

ahmed2014 wrote thank you but why no 3G router same as TL-MR3220 support only SIM card not need USB modem ? I think when router support this with external antenna HSDPA/GSM this very best I do agree...