Wi-fi is 54mbps but should be 100 what should i do?

Wi-Fi provides wireless Internet access over distances of up to 100 meters (00 feet).

To use Wi-Fi on your phone, you need access to a wireless access point or "hotspot". The availability
and range of the Wi-Fi signal depends on the number, infrastructure, and other objects
through which the signal passes.

Turning Wi-Fi on and connecting to a wireless network
From the Home screen, press MENU, and then tap Settings > Wireless & networks.
Select the Wi-Fi check box to turn Wi-Fi on. The phone then scans for available wireless
networks.

Tap Wi-Fi settings. The network names and security settings of detected Wi-Fi networks
are displayed in the Wi-Fi networks section.
If the wireless network you want to connect to is not in the list of detected networks,
scroll down the screen, and then tap Add Wi-Fi network. Enter the wireless network
settings, and then tap Save.

Tap the Wi-Fi network you want to connect to.
If you selected an open network, you will be automatically connected to the network.
If you selected a network that is secured with WEP, enter the key and then tap
Connect.

Depending on the network type and its security settings, you may also need to enter more information
or choose a security certificate.
When your phone is connected to a wireless network, the Wi-Fi icon appears in the
status bar and tells you the approximate signal strength (number of bands that light up).
The next time your phone connects to a previously accessed secured wireless network, you
will not be prompted to enter the key or other security information again, unless you reset
your phone to its factory default settings.

I can't say 100% for sure, but usually if the wi-fi works for a computer, it should work for an iPad. Therefore, I highly doubt you'd have to upgrade the router.

Home wireless networks based on the 802.11b or 802.11g standards transmit their signal in a narrow radio frequency range of 2.4 GHz. Various other electronic devices in a home, such as cordless phones, garage door openers, baby monitors, and microwave ovens, may use this same frequency range. Any such device can interfere with a Wi-FI home network, slowing down its performance and potentially breaking network connections.
The 2.4 GHz Wi-Fi signal range is divided into a number of smaller bands or "channels," similar to television channels.Many wireless products ship with a default Wi-Fi channel of 6. If encountering interference from other devices within the home, consider changing the channel up or down to avoid it. Some Wi-Fi channel numbers overlap with each other. Channel 1 uses the lowest frequency band and each subsequent channel increases the frequency slightly. Therefore, the further apart two channel numbers are, the less the degree of overlap and likelihood of interference.
If this won't work, Then consider buying a new wireless router as your current is deemed broken.

Reset!
Look for a small hole back on the router.Press the inside button for 10 seconds.Wait until the router power back on.Enter in the router IP and configure it again.

If you need more help come back.Post / thumbs / testimonial are welcome!

First connect your router to computer with ethernet cable.then
acess it with following link

http://192.168.1.1
or
http://192.168.0.1
type user name as "admin" and password as "admin" or blank or "password""
then configure your router as your isp settings.
Then enable wi f iin your router .
Then go to your laptop or computer .
Turn wi fi swtich on laptop.
then check wi fi network driver are installed.
Open my network placxes then find your wi f inetwork then connect .

Can you get other signals that are not your own?

If yes:
Reset the router back to factory default settings by using the tiny
reset button on the back/bottom.

If no:
Make sure your wireless card is turned on. Make sure you can see it in device manager.

It appears you are using a 802.11b WI-FI card (either at the PC or the Access Point side). If the card is a 802.11g instead, check out the settings to verify 802.11g is enabled. Regards.